
	Where results make sense

Topic: Transconductance

Related Topics

Vacuum tube

Gas filled tube

Royal Brunei

Shang Dynasty

	Mu and transconductance
		The amplification factor (represented as andmu;) of a tube is equal to the ratio of a change in plate voltage to the change in grid voltage required to cause the same change in plate current.
		Transconductance is a measure of the change in plate current to a change in grid voltage, with plate voltage held constant.
		The unit for conductance is the mho (siemens), pronounced "moe." Transconductance is normally expressed in either micromhos or millimhos.
	www.tpub.com /neets/book6/20k.htm (828 words)

	Electronics 22
		The idea of the OTA is to provide a transconductance amplifier, whose input is the differential voltage between its inputs, which are the bases of the transistors of a standard differential amplifier, and whose output is a current proportional to the differential voltage.
		The transconductance is the ratio of the output current to the input voltage, denoted by g
		The transconductance of an OTA is proportional to the bias current I
	www.du.edu /~etuttle/electron/elect22.htm (761 words)

	Transconductance - Wikipedia, the free encyclopedia
		Conductance is the reciprocal of resistance and transconductance is the ratio of the current at the output port and the voltage at the input ports and is written as g
		For vacuum tubes, transconductance is defined as the change in the plate(anode)/cathode current divided by the corresponding change in the grid/cathode voltage, with a constant plate(anode)/cathode voltage.
		Similarly, in field effect transistors, transconductance is the change in the drain/source current divided by the change in the gate/drain voltage with a constant drain/source voltage.
	www.sciencedaily.com /encyclopedia/transconductance (570 words)

	NationMaster - Encyclopedia: Transconductance (Site not responding. Last check: )
		In contrast, transconductance is the control of a current through two output points by a voltage at two input points, as if the conductance is transferred from the input points to the output points.
		In the world of vacuum tubes, transconductance is the change in the plate(anode)/cathode current divided by the corresponding change in the grid/cathode voltage, with a constant plate(anode)/cathode voltage.
		An MOS transistor 78 is connected between the emitters of the transistor 68 and 72, as shown, with the gate of the MOS transistor 78 being connected to the collector of the NPN transistor 66.
	www.nationmaster.com /encyclopedia/Transconductance (1217 words)

	Transconductance (Site not responding. Last check: )
		Where conductance is the creation of a current through two points where a voltage is applied, transconductance is the creation of a current through two output points caused by a voltage at two input points.
		In the world of vacuum tube s, transconductance is the relationship between the plate current and the grid voltage, with a constant plate voltage.
		Transresistance is the dual of transconductance, and is the origin of the term transistor.
	www.serebella.com /encyclopedia/article-Transconductance.html (186 words)

	Transconductance (Site not responding. Last check: )
		Transconductance is a property of certain electronic components.
		Whereas conductance is the creation of a current through two points where a voltage is applied, transconductance is the creation of a current through two output points caused by a voltage at two input points, as if the conductance is transferred from one junction to another.
		In the world of vacuum tubes, transconductance is the relationship between the plate current and the grid voltage, with a constant plate voltage.
	www.gogoglo.com /wiki/en/wikipedia/t/tr/transconductance.html (192 words)

	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal (Site not responding. Last check: )
		Conductance is the reciprocal of resistance and transconductance is the ratio of the current at the output port and the voltage at the input ports and is written as g
		For vacuum tubes, transconductance is defined as the change in the plate(anode)/cathode current divided by the corresponding change in the grid/cathode voltage, with a constant plate(anode)/cathode voltage.
		Similarly, in field effect transistors, transconductance is the change in the drain/source current divided by the change in the gate/drain voltage with a constant drain/source voltage.
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=transconductance (550 words)

	measuring transconductance(gm) - Electronic Circuits Projects Diagrams Free
		Transconductance is measured with a voltage input, not a bias current input.
		Transconductance is a measure of the change in plate current to a change in grid voltage, with plate voltage held constant.
		The unit of transconductance is the "mho", which is measured in amps/volt, and is not surprisingly "ohm" spelled backwards, because one ohm is equal to one volt divided by one amp, so the unit of resistance, the ohm, is a volt/amp.
	www.electro-tech-online.com /general-electronics-chat/19707-measuring-transconductance-gm.html (979 words)

	physics - Transconductance
		In contrast, transconductance is the control of a current through two output points by a voltage at two input points, as if the conductance is transferred from the input points to the output points.
		In the world of vacuum tubes, transconductance is the change in the plate(anode)/cathode current divided by the corresponding change in the grid/cathode voltage, with a constant plate(anode)/cathode voltage.
		The origin of the term transistor is a contraction of "transconductance varistor", sometimes incorrectly attributed to a contraction of transresistance.
	www.physicsdaily.com /physics/Transconductance (607 words)

	Transconductance Amplifier Applications (1)
		Some of the important properties of such an amplifier are the stability and uncertainty of the transconductances, the distortion, the linearity with output current levels, the output impedance, and the variation of these properties with frequency, compliance voltage and temperature.
		To determine the dc transconductance, an average is taken of the value obtained with a positive voltage input and the value obtained with a negative voltage input.
		The amplifier was calibrated at the 20 A level on the 100 A range using a broadband resistor and a precision voltmeter to determine the output current and the internal voltmeter to determine the compliance voltage.
	www.clarke-hess.com /taapp1.html (1754 words)

	U.S. Patent: 5650747 - Circuit technique for implementing programmable zeros in high speed CMOS filters - July 22, 1997
		The differential transconductance element of claim 4 further comprising a differential feedback transconductor of said first type coupled in parallel to said differential transconductor of said first type, said differential transconductor of said first type having a pair of input terminals coupled to receive a pair of differential feedback signals, respectively.
		While all of the transconductance elements (NMOS and PMOS) are functionally parallel to each other, the physically serial connection of the NMOS transconductance element allows it to be biased using the current required by the PMOS transconductance elements.
		The transconductance of the PMOS transconductors 304 and 306 is adjusted by the bias current I.sub.b1 which is controlled by a separate transconductance setting circuit (not shown).
	www.everypatent.com /comp/pat5650747.html (2941 words)

	Transconductance scaling circuit and method responsive to a received digital code word for use with an operational ...
		Integrated operational transconductance amplifier (OTA) circuits are used in a wide array of applications such as filtering or signal level regulation (i.e., gain or attenuation blocks).
		An operational transconductance amplifier (OTA) is a device that outputs a current which is proportional to a differential voltage input.
		Transconductance, Gm, is defined as the differential of the output current divided by the differential of the input voltage.
	www.freepatentsonline.com /5530399.html (3131 words)

	What is transconductance? - a definition from Whatis.com
		Formally, for a bipolar device, transconductance is defined as the ratio of the change in collector current to the change in base voltage over a defined, arbitrarily small interval on the collector-current-versus-base-voltage curve.
		For an FET, transconductance is the ratio of the change in drain current to the change in gate voltage over a defined, arbitrarily small interval on the drain-current-versus-gate-voltage curve.
		The slope of this line represents the theoretical transconductance of a bipolar transistor for a given base voltage and collector current, or the theoretical transconductance of an FET for a givengate voltage and drain current.
	whatis.techtarget.com /gDefinition/0,294236,sid9_gci214200,00.html (354 words)

	Transconductance Amplifier Buffers Current Transformer - Maxim/Dallas
		Abstract: Three forms of transconductance amplifier are presented, with emphasis on the configuration suitable for use with current transformers.
		Transconductance amplifiers provide a good method for converting current to voltage in most current-measurement applications.
		These forms of the transconductance amplifier are useful for inputs that closely resemble an ideal current source, as does (for example) a photo-diode preamplifier, but they are not suitable for use with a current transformer.
	www.maxim-ic.com /appnotes.cfm?an_pk=3285 (507 words)

	Transconductance Amplifier - Model 8100
		The Model 8100 Transconductance Amplifier is a precision, high stability, high accuracy instrument which produces an output current which is directly proportional to the input voltage over the frequency range from dc to 100kHz.
		The Model 8100 Transconductance Amplifier has a CALIBRATION PANEL on the front panel which allows the unit to be calibrated without having to remove either the top or bottom cover.
		The dc uncertainty is based on the average of the transconductance obtained with a positive and a negative input.
	www.clarke-hess.com /8100.html (890 words)

	Application of the Operational Transconductance Amplifier (OTA)
		The application of the operational transconductance amplifier (OTA) in the design of simple amplifiers with voltage-controllable gain and to the design of firs-order and second-order active filters with controllable gains and controllable critical frequencies is demonstrated.
		This paper demonstrates the usefulness of the operational transconductance amplifier (OTA) as a replacement for the conventional op-amp in both first and second-order active filters.
		In other words, instead of employing feedback to reduce the sensitivity of a circuit’s performance to device parameters, the transconductance is treated as a design parameter, much as resisto rs and capacitors are treated in op-amp based circuits.
	et.nmsu.edu /~etti/winter98/electronics/grise/wrg.html (2031 words)

	Vacuum Tubes, Inc. Homepage, Electron Tubes
		All used tubes are tested on a transconductance tester.
		Power output tubes are matched for plate current and transconductance (within 5% for both parameters).
		Small signal tubes are matched for transconductance (within 5%).
	www.vacuumtubesinc.com (646 words)

	Improving the Cascode's PSRR (page 2)
		In the Grounded Cathode amplifier the transconductance of the triode is mitigated by the addition of the plate resistor.
		The top triode strives both to shield the input grid from the top triode's Miller effect and to preserve the transconductance of the bottom triode.
		This effective increase in capacitance greatly reduces the high frequency response of the amplifier; whereas in the Cascode amplifier, the input grid-to-plate capacitance is virtually identical to its static value, as its plate voltage is held at a nearly constant value.
	www.tubecad.com /march99/page2.html (358 words)

	Home Page @ Groove Tubes
		A tube can have very high transconductance but if the plate resistance is low the gain will be very low even though the tube looks great on a TC tester.
		Conversely, a tube such as a long smooth plate Ei might have a very low transconductance reading but due to high plate resistance be a very high gain tube.
		The number on the box is something of a code that takes into account the transconductance, current output, plate resistance, curve traces for the tube's constant current curves over the entire operating range of the tube in circuit under load with signal, and TRUE gain.
	groovetubes.com (1119 words)

	Field effect transconductance amplifiers
		Field effect transconductance amplifiers having improved linearity and noise rejection characteristics to provide an amplifier output having excellent temporal coherence with the input signal are disclosed.
		The device of claim 22 wherein said first and second field effect devices are biased to operate in a partial carrier velocity limited region, whereby the dependence of the output conductance of said first and second field effect devices on drain current is reduced to approximate that of the transconductance of said field effect devices.
		The device of claim 23 wherein said third field effect device is also biased to operate in a partial carrier velocity limited region, whereby the dependence of the output conductance of said third field effect device on drain current is reduced to approximate that of the transconductance of said field effect devices.
	www.devileye.net /patents/automated_de-coking/field_effect_transconductance_amplifiers.html (954 words)

	Current mode transconductor tuning device patent invention (Site not responding. Last check: )
		The level of output current is calculated by multiplying the input voltage by a transconductance (gm).
		Therefore, if the transconductor is used in a circuit requiring an accurate transconductance, the transconductor requires a transconductor tuning circuit to maintain a constant transconductance.
		2, the tuning circuit 20 controls transconductances of the transconductors 10_1 to 10_n according to the control voltage V.sub.b that is output from an amplifier A3.
	www.freshpatents.com /Current-mode-transconductor-tuning-device-dt20060810ptan20060176106.php (1149 words)

Try your search on: Qwika (all wikis)