
	Where results make sense

Topic: Analog multiplier

Related Topics

Product detector

Analog electronics

Electronics

Frequency mixer

Audio effect

Multiplexer

Counter

CDMA

Transducer

Inverse multiplexer

SSB

MDM

Digital subscriber line access multiplexer

Electronics

	U.S. Patent: 5587682 - Four-quadrant biCMOS analog multiplier - December 24, 1996
		The analog multiplier of claim 2, wherein the gate of the MOS transistor in the first differential leg is directly connected to the gate of the MOS transistor in the fourth differential leg;
		Conventional four-quadrant multiplier circuits include those circuits which depend upon variations in transconductance in differential stages, and those circuits which are hardware implementations of a quadratic algebraic function (and rely upon the quadratic characteristics of MOS transistors).
		Accordingly, analog multiplier 20 according to this preferred embodiment of the invention is particularly well-suited for use in integrated circuits intended for low voltage applications, such as telecommunications equipment, battery-powered portable notebook or laptop computers, and the like.
	www.everypatent.com /comp/pat5587682.html (5191 words)

	Analog multiplier - Wikipedia, the free encyclopedia
		In this case the analog multiplier may be considered to be a voltage controlled amplifier.
		Applications specific to a true analog multiplier are those where both inputs are signals, for example in a frequency mixer or an analog circuit to implement a discrete Fourier transform.
		Although analog multiplier circuits are very similar to operational amplifiers, they are far more susceptible to noise and offset voltage-related problems as these errors may become multiplied.
	en.wikipedia.org /wiki/Analog_multiplier (683 words)

	Four quadrant analog multiplier circuit of floating input type - Patent 5187682
		A four quadrant analog multiplier circuit claimed in claim 2 wherein said first and second differential circuit of all said first to third squaring circuits have the same proportion of said gate width-to-length ratio of said second MOS transistor to said gate width-to-length ratio of said first MOS transistor.
		A four quadrant analog multiplier circuit claimed in claim 4 wherein said first and second differential circuits of all said first to fourth squaring circuits have the same proportion of said gate width-to-length ratio of said second MOS transistor to said gate width-to-length ratio of said first MOS transistor.
		Known conventional analog multiplier circuits include a Gilbert multiplier circuit composed of only bipolar transistors, a MOS multiplier circuit formed by substituting MOS transistors for the bipolar transistors of the Gilbert multiplier circuit, and a CMOS multiplier circuit formed by constituting the Gilbert multiplier circuit by CMOS transistor circuits.
	www.freepatentsonline.com /5187682.html (2371 words)

	Reliability-weighted analog threshold decoder - Patent Review 4322848 (Site not responding. Last check: 2007-10-11)
		An analog threshold decoder as defined in claim 1, wherein said code employs signalling voltages of.+-.A volts, and said non-linear function is defined by: ##EQU12## where v is the received analog voltage level, R is the input reliability voltage, and m is a gain constant.
		In the analog threshold decoder these calculations are performed by analog multipliers 40, 42, 44 and 46, with multiplier 40 performing the fourth calculation, multiplier 42 performing the third calculation, multiplier 44 performing the second calculation and multiplier 46 performing the first calculation.
		In general, the received analog voltages are provided as inputs to a reliability weighting function generator 100 and a suitable non-linear transformation is performed such that the output of the weighting function generator will be a voltage proportional to the reliability of the received voltage.
	www.wikipatents.com /4322848.html (4381 words)

	ANSDIT - The letter "A" (Site not responding. Last check: 2007-10-11)
		Data represented by a physical quantity that is considered to be continuously variable and whose magnitude is made directly proportional to the data or to a suitable function of the data.
		A functional unit whose output analog variable is proportional to the quotient of two input analog variables.
		An amplifier attached to one or more analog output channels, such as one that adapts the output signal range of the digital-to-analog converter to the signal level necessary to control the technical process.
	www.ncits.org /tc_home/k5htm/a2.htm (1853 words)

	Complementary analog multiplier circuits with differential ground referenced outputs and switching capability - Patent ... (Site not responding. Last check: 2007-10-11)
		A four quadrant multiplier comprises X and Y input stages for coupling signals to a gain core amplifier for multiplication, wherein each of the input stages and the gain core amplifier further comprises a pair of complementary circuits, based on devices having opposite conductivity properties.
		A complementary multiplier according to claim 7, wherein the emitter areas of said first pair of transistors are between three times and seven times greater than the emitter areas of said second pair of transistors.
		A complementary multiplier according to claim 8, wherein the emitter areas of said first pair of transistors are five times greater than the emitter areas of said second pair of transistors.
	www.freepatentsonline.com /5389840.html (6171 words)

	JSSC Classic Paper: The Gilbert Cell (continued from January 2003)
		The extension to four-quadrant operation (the more generally expected function of an analog multiplier) was straightforward, and also was presented in the paper, as was an alternative form in which the emitters of Q1 and Q4 were driven by the X-input currents and connected to the bases of Q2 and Q3 (Figure 2a).
		Often, these six-transistor cells were called "transconductance multipliers." The term is clearly incorrect, since all inputs and outputs are in current form; the transconductance aspects of its operation are all internal to the cell, and completely incidental to its operation.
		However, when these multipliers were deliberately over-driven at their bases (Figure 2b) they could be used in a current-steering, or switching, mode to realize the core of a low-noise commutating mixer.
	www.ieee.org /organizations/pubs/newsletters/sscs/apr03/jssc2.html (1063 words)

	Analog Glossary
		For analog signals, the width is in the frequency domain, expressed in Hz.
		Bipolar circuits are often chosen for high-performance analog functions while CMOS circuits are often used for digital functions as well as analog functions (see CMOS).
		At Intersil, an IC consisting of multiple analog CMOS switches and digital decoding, allowing one of many inputs to be passed to the output.
	www.intersil.com /amps/glossary.asp (3786 words)

	Electronics 28
		We have already encountered multiplication of two signals, in Amplitude Modulation and Superheterodynes, where an AM signal is produced by multiplying the modulation and the carrier, to produce the sidebands, and adding enough additional carrier so that the envelope reproduces the modulation, allowing the modulation to be recovered easily by rectification and filtering.
		The output of the multiplier is fed back to the inverting input of an op-amp, which then strives to make this voltage equal to the voltage applied to its noninverting input.
		The analog multiplier is a versatile device that should be kept in mind.
	www.du.edu /~etuttle/electron/elect28.htm (3545 words)

	Key Tech :: Floating-Gate Programming Methods - More Info
		Sarpeskar [11] showed that an analog computation can have significant advantages over a digital solution when the resolution of the inputs is around 10 bits or less.
		We have developed RASP (Reconfigurable Analog Signal Processor) as a testbed integrated circuit (IC) to study the floating-gate switches, and the interaction between the CAB components and the switch matrix.
		Each CAB is comprised of components critical to signal processing applications including a four-by-four matrix-vector multiplier, three wide-range operational transconductance amplifiers (OTAs), and a transistor-only version of the autozeroing floating-gate amplifler (AFGA) or capacitively coupled current conveyor (C4) [16].
	www.ece.gatech.edu /research/labs/cadsp/fgpm_2.shtml (2463 words)

	Model 5210 Analog Lock-in Amplifier
		These include those requiring a true analog output, for example in some feedback control loops, or where the instrument is used to recover the envelope modulation of a "carrier" frequency.
		It offers much better performance than can be achieved by using a true analog multiplier, which requires the synthesis of a very pure reference sinusoid and is very non-linear when handling large levels of interfering signal.
		The analog outputs from the demodulators, after filtering by the output low-pass filters, need to be digitized by an analog to digital converter (ADC) for display or for transfer to the controlling computer.
	www.signalrecovery.com /5210.htm (1331 words)

	Newman Energy Machine: Approach
		As shown in the schematic diagram of this instrument in figure 6, these two signals are applied to the input terminals of an analog multiplier circuit.
		In place of the signal from the internal shunt, the signal from a new voltage attenuator is applied to the multiplier circuit.
		across the load resistor by multiplying the thermal element voltage by the resistance ratio of the load resistor to the parallel combination of the shunt resistor and the resistance of the thermal element.
	www.ncas.org /nbsreport/approach.html (2523 words)

	Compensation Circuit for a Planar Vibratory Microgyroscope
		The output of the phase shifter is fed to one of two input terminals of an analog multiplier.
		Therefore, the time-averaged output of the analog multiplier is proportional to the amplitude of the Coriolis signal (proportional to WQ) and to the amplitude of the drive signal (proportional to Q
		Thus, the output of the analog multiplier is proportional to W only, as desired, regardless of variations in Q.
	www.nasatech.com /Briefs/June00/NPO20089.html (468 words)

	Untitled Document
		Analog Devices Inc., a global leader in high-performance semiconductors for signal processing applications, announced an integrated synthesizer that is the first solution to feature a 1 GSPS direct digital synthesizer (DDS), 10-bit D/A converter and fast frequency hopping and fine-tuning resolution functionalities on a single chip.
		The analog functionality that has been brought on chip includes the PLL and the analog multiplier (mixer) for the actual conversion.
		Instead, too, of boasting "14 bits" the architecture uses whatever is needed at each stage in the game: Frequency accumulation is 32 bits, phase accumulation is 15 bits and the output of the phase-to-amplitude converter is 10 bits, as is the output ADC - which can be clocked up to 1 Gsample/s.
	www.analogzone.com /hfp_0923.htm (729 words)

	[No title] (Site not responding. Last check: 2007-10-11)
		The amendments to claim 1 had the effect of changing the "circuit means" in claim 5 to include "a pulse-width modulator" and the "multiplier" of claim 4 to a "switching analog" multiplier circuit.
		The district court found that the non-switching multiplier used by defendant Micro Linear was not an equivalent of the "switching multiplier" of the claim, based on the prosecution history, and granted Micro Linear summary judgment of noninfringement.
		Thus, the Federal Circuit held that Pioneer was estopped from "arguing that a non-switching multiplier circuit is equivalent to the switching multiplier circuit limitation" and affirmed the district court's finding of noninfringement.
	www.kayescholer.com /web.nsf/sl/32A3EF00EC876FF085256DFA0062D046 (3179 words)

	The Ultimate Electronics - American History Information Guide and Reference
		Most analog electronic appliances, such as radio receivers, are constructed from arrays of a few types of circuits.
		Computers, electronic clocks, and programmable logic controllers (used to control industrial processes) are constructed of digital circuits.
		analog to digital converters and digital to analog converters are the primary examples.
	www.historymania.com /american_history/Electronics (579 words)

	Power-down activated by differential-input multiplier and comparator (US6791371)
		The voltage difference across the differential inputs is applied to a multiplier, which generates a squared difference.
		The multiplier can be implemented with a Gilbert cell, while a filter-comparator converts the differential Gilbert-cell output to a single-ended signal and filters the signal.
		a multiplier, receiving the true and complement differential inputs, for squaring a voltage difference between the true and complement differential inputs to generate a squared voltage;
	www.delphion.com /details?pn=US06791371__ (421 words)

	analogmods
		It is desirable to have separate filters on each string and to be able to control external analog synth hardware with the GR-300.
		The multiplier would be trivial if you use a multiplier chip such as the Analog Devices AD633.
		If you don't feel like building or buying six fully functional monophonic analog synths to make a polyphonic guitar synth, a monophonic version can be designed.
	www.marksmart.net /gearhack/gr300/analogmods/analogmods.html (642 words)

	Multiplier circuit (US5151624)
		The invention relates to a multiplier circuit which is constructed from two multiplier cells according to the prior art.
		The disadvantage of different signal transit times in the emitter followers and the differential stages for the two input signals to be treated identically is overcome by arranging the transmission paths symmetrically.
		The limiting frequency of the arrangement according to the invention is no longer limited by the phase error, but solely by the switching time of the bipolar transistors employed, and is therefore higher than in a multiplier circuit according to the prior art.
	www.delphion.com /details?pn10=US05151624 (202 words)

	HD Radio Self-Noise (Site not responding. Last check: 2007-10-11)
		Although closer than the analog signal, at one two-hundredth the power the digital sidebands are not likely to interfere.
		The composite signal is either passed unaltered or is inverted, with the changeovers at a 38-kHz rate synchronized to the 19-kHz pilot.
		The signal never undergoes variable attenuation as with an analog multiplier, so linearity depends almost entirely on the fidelity of the inversion transitions.
	users.tns.net /~bb/hdrsn.htm (2257 words)

	02.02.98 AGC disciplines RF and fiber signals so they "ain't misbehavin'"
		Although analog signals, such as RF waveforms, would still have varying power levels, the ability of digital circuitry to retrieve and restore pristine signal levels would make dynamic-range problems much less common.
		Wireless systems in new and widespread applications have increased the demands on analog circuitry, which must capture the usually minuscule front-end signal and make it viable--an increasing challenge when the signal strength fluctuates because of rainfall attenuation, tree absorption, and walls and openings in buildings.
		The function of an AGC is simple: to keep the maximum and minimum signal voltages or power levels within desired boundaries despite inherent widespread variations and to do it by automatically controlling gain in a closed-loop control function, based on the input-signal strength.
	www.edn.com /archives/1998/020298/03cs.htm (3638 words)

	Multiplier/adder circuit (Site not responding. Last check: 2007-10-11)
		reby said binary input signals control the connection of said gain controlling means and thus the gain of said analog multiplier circuit and the value of said output signal derived from said analog signal.
		Structure as in claim 2 wherein said second input lead of such second sample and hold circuit is also connected to a voltage to be added to the product of said binary coded number and said analog voltage to be multiplied.
		means for generating a first signal of equal sign and magnitude as said analog signal and a second signal of opposite sign and equal magnitude as said analog signal;
	www.well.com /~youlee/bar_feed_mechanism/multiplier_adder_circuit.html (1031 words)

	Chris Trask: Analogue Multiplier References
		Gilbert, B., "A Precise Four-Quadrant Multiplier with Subnanosecond Response," IEEE Journal of Solid-State Circuits, Vol.
		Gilbert, B. and P. Holloway, "A Wideband Two-Quadrant Analog Multiplier," Proceedings of the 1980 IEEE International Solid-States Circuits Conference, pp.
		Kimura, K., "A Bipolar Four-Quadrant Analog Quarter-Square Multiplier Consisting of Unbalanced Emitter-Coupled Pairs and Expansions of Its Input Ranges," IEEE Journal of Solid State Circuits, Vol.
	home.earthlink.net /~christrask/anlgmlt.html (568 words)

	Regulated Power Source is Insensitive to Load-Resistance Changes - Maxim/Dallas
		The circuit shown is analogous to a voltage or current source, delivering fixed power levels that are independent of the load resistance.
		Because the multiplier output is inverted, a unity-gain inverting stage (U4) is added to re-invert the output-power signal.
		To work properly, the analog multiplier must be calibrated as explained in the Motorola's MC1495 data sheet.
	www.maxim-ic.com /appnotes.cfm/appnote_number/1128 (614 words)

	A Highly Linearized CMOS Multiplier with a Controlled Tail Current Source -- SHOUNO et al. E89-A (6): 1533 -- IEICE ...
		This paper proposes a linearized multiplier using the MOS transistors.
		[11] K. Kimura, "An MOS four-quadrant analog multiplier based on the multitail technique using a quadritail cell as a multiplier core," IEEE Trans.
		[13] E. Ibaragi, A. Hyogo, and K. Sekine, "A CMOS analog multiplier free from mobility reduction and body effect," IEICE Trans.
	ietfec.oxfordjournals.org /cgi/content/refs/E89-A/6/1533 (574 words)

	Wide Bandwidth Precision Analog Multiplier - MPY634 - TI Product Folder
		The MPY634 is a wide bandwidth, high accuracy, four-quadrant analog multiplier.
		Its accurately laser-trimmed multiplier characteristics make it easy to use in a wide variety of applications with a minimum of external parts, often eliminating all external trimming.
		Its differential X, Y, and Z inputs allow configuration as a multiplier, squarer, divider, square-rooter, and other functions while maintaining high accuracy.
	focus.ti.com /docs/prod/folders/print/mpy634.html (475 words)

	Power Meter Is ±1% Accurate - Maxim/Dallas
		This application note describes the use of a high-side current-sense amplifier and a four quadrant analog multiplier to produce an output voltage proportional to the power being delivered to a load.
		This power meter is most accurate for multiplier inputs (J1 and J2) between 3V and 15V.
		For proper operation, the analog multiplier must first be calibrated according to the following procedure (which also appears in Motorola's MC1495 data sheet).
	www.maxim-ic.com /appnotes.cfm/appnote_number/1160 (549 words)

Try your search on: Qwika (all wikis)