
	Where results make sense

Topic: Time to digital converter

Related Topics

78

NBC Today Show

Mars (planet)

Forsvarsdepartementet

Los Angeles Dodgers

Sentimental Hygiene

Alyson Kiperman

	Time to digital converter - Wikipedia, the free encyclopedia
		In electronic instrumentation and signal processing, a time to digital converter (abbreviated TDC) is a device for converting a signal of sporadic pulses into a digital representation of their time indices.
		Because the magnitudes of the pulses are not usually measured, a TDC is used when the important information is to be found in the timing of events.
		TDCs are most often used in applications where measurement events happen infrequently, such as high energy physics experiments, where the sheer number of data channels in most detectors ensures that each channel will be excited only infrequently.
	www.wikipedia.org /wiki/Time_to_digital_converter (196 words)

	Digital - Encyclopedia.WorldSearch (Site not responding. Last check: 2007-11-03)
		The analog to digital converter only has a certain resolution: whereas the human eye may be able to detect tens of thousands of different intensities of pure green, the CCD in a digital camera may only be capable of 256, and at a resolution of a megapixel or so.
		Although digital signals are generally associated with the binary electronic digital system used in modern electronics and computing, digital systems are actually ancient, and need not be binary nor electronic.
		Smoke signals are one of the oldest examples of a digital signal, where an analog "carrier" (smoke) is modulated with a blanket to generate a digital signal (puffs) that convey information.
	encyclopedia.worldsearch.com /digital.htm (760 words)

	Counting circuit system for time-to-digital converter - Patent 4090191 (Site not responding. Last check: 2007-11-03)
		This invention relates to a converting circuit and, more particularly, to a time to digital converting circuit in which clock pulses are gated by time signals to make a pulse train which is proportional to the time signals and the pulse train is counted to provide digital information.
		The time 14 when the interval 13 of the time signals terminates appears at an arbitrary phase which is independent from the phase of the clock pulses and, therefore, a last clock pulse 15 is liable to assume an incomplete pulse wave form.
		The time signals on the terminal 22 are applied as a wave form 51, the reset signals on the terminal 30 are applied as a wave form 57 and the switch over signals on the terminal 38 are applied as a wave form 60.
	www.freepatentsonline.com /4090191.html (2282 words)

	Ultra high-speed time-to-digital converter - Patent 4719608
		A converter as claimed in claim 2, wherein the directions of propagation of the start signal and of the stop signal along the parallel paths formed by the first and second chains are oppsite to one another.
		A converter as claimed in claim 2, wherein the directions of propagation of the start signal and of the stop signal along the parallel paths formed by the first and second chains are identical, said first propagation time being longer than said second propagation time.
		To this end, the converter is provided with coding means having inputs connected with the gates of at least one of the chains, to supply, a digital measuring value which is a function of the condition of said gates.
	www.freepatentsonline.com /4719608.html (2797 words)

	Time-to-digital converter and locking circuit and method using the same - US Patent 6377093 (Site not responding. Last check: 2007-11-03)
		The time-to-digital converter of claim 10, wherein the first precharging unit comprises a first PMOS transistor which is gated with the first sensing signal, and the second precharging unit comprises a second PMOS transistor which is gated with the second sensing signal.
		The present invention relates to an integrated circuit, and more particularly, to a converter for converting into a digital signal the difference between the times at which two signals are input and a locking circuit and method for generating a periodic signal such as a clock signal using the converter.
		The delay time of the delay unit 101 is controlled by the activation width of the phase difference signal DET. A clock driver 103 is driven by a delay clock signal DCLK output from the delay unit 101 and generates an internal clock signal ICLK.
	www.patentstorm.us /patents/6377093.html (8389 words)

	Time-to-digital converter - US Patent 6501706 (Site not responding. Last check: 2007-11-03)
		The time-to-digital converter of claim 7 wherein the-clock and clock delay signals are substantially in phase and wherein the clock delay signal lags the clock signal by one period of the clock signal.
		The time-to-digital converter of claim 40 wherein the act of recording the arrival time of the signal with respect to the clock signal includes recording the arrival time of the signal with respect to the clock signal within one period of the clock signal.
		The arrival time of the signal is proportional to the ratio of the currents generated by the two current sources as well as by the frequency and the number of clock cycles between the closing and opening of the control switch.
	www.patentstorm.us /patents/6501706.html (10054 words)

	Timing modules (Site not responding. Last check: 2007-11-03)
		Time digitiser and histogramming unit for fast spectrum acquisition in time-of-flight mass spectrometry, ion or photon counting.
		The unit is optimised for building arrival time histograms with the signal received from a digital pre-amplifier mounted close to a particle detector.
		With 2 ns timing resolution and 2 ns dead time, the unit is ideally suited to high data rates.The unit issues or receives a cycle start signal at pre-set intervals and waits to receive timing pulses from a detector.
	www.kore.co.uk /tdc.htm (213 words)

	[No title] (Site not responding. Last check: 2007-11-03)
		The measurement of the unknown time interval is performed with reference to a known constant time interval equal to the period of an external clock.
		The cumulative effect of the TDC cell to a negative pulse with duration T is a negative output pulse with reduced duration.
		time interval between the start and stop signals; and a time-to-digital converter (TDC) receiving as input the At time interval between the start and stop signals, said time-to-digital converter for digitizing the At time interval with reference to an off-chip precise reference clock.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=03/88485.031023&ELEMENT_SET=DECL (4057 words)

	LeCroy Model 1877 Fastbus 96 Ch. Multihit Time-to-Digital Converter
		With its shorter conversion time, higher precision and larger dynamic range, the 1877 is the perfect replacement for the 1879 in high rate, high accuracy applications.
		By capturing both the rising and falling edge time information, the Model 1877 can be used in a "time-over -threshold" technique to simultaneously determine the time and total charge collected or, in some cases, the time and peak value for a given detector element using only one channel of TDC electronics.
		Front-panel signals are converted to TTL and routed to Auxiliary Connec tor.
	www.lecroy.com /lrs/dsheets/1877.htm (1672 words)

	LeCroy Models 2228A, 2229 and 4208 CAMAC Time-to-Digital Converters
		The 2228A or 2229 converts the measured time intervals into 11-bit digital numbers using a 20 MHz internal clock for a full-scale digitizing time of 100 µsec.
		Three switch-selectable full-scale time ranges, 100, 200 and 500 nsec, are digitized to 95% of 11 bits (2048 counts) and provide 50, 100 and 250 psec resolutions respectively.
		The unit may also be configured as two 4-hit time digitizers, four 2-hit digitizers or as any of several other combinations of inputs and hits.
	www.lecroy.com /lrs/dsheets/2228.htm (2619 words)

	KEMBLE & RUDE COMMUNICATIONS
		The new purely digital ACAM Picostrain PS01 chip for strain gage measurement capitalizes on proven time-to-digital converter (TDC) technology to offer product designers a more flexible "alternative to analog" for measuring metal strain gages or temperature.
		Digital design provides excellent output stability over a wide operating temperature range of -40 to 120°C. The PS01 has a 48 TQFP enclosure and 8-bit or SPI serial interfaces.
		The optional PSA1 setup and evaluation shortens development time for boards using the PS01 chip by allowing all of the chip's setup parameters to be quickly configured and checked via a graphical PC interface.
	www.eos.net /kemblerude/TD-ACAM.html (480 words)

	acam-messelectronic - TDC's - PICOSTRAIN - PICOCAP - PICOTURN (Site not responding. Last check: 2007-11-03)
		The term time-to-digital converter is used when talking about time interval measurements in the range of 1 nanosecond down to the picosecond range.
		The first TDC's have deen developed for scientific and research purposes.
		Thanks to modern CMOS technology it is possible to integrate fully digital time-to-digital converters into a single chip.
	www.acam.de /Content/English/tdc.html (147 words)

	time-sharing - Hutchinson encyclopedia article about time-sharing (Site not responding. Last check: 2007-11-03)
		In computing, a way of enabling several users to access the same computer at the same time.
		The computer rapidly switches between user terminals and programs, allowing each user to work as if he or she had sole use of the system.
		This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.
	encyclopedia.farlex.com /time-sharing (123 words)

	Analysis of fluorescence effects in a position sensitive gas detector using a time-stamp time-to-digital converter (Site not responding. Last check: 2007-11-03)
		To circumvent this problem we used the prototype of a time-stamp TDC based on the equality between the sum of the delays of the cathode signals relative to the anode signal and the total delay of the delay line (T) with a linear detector (T=300 ns).
		The drift time of the electrons to the anode wire was measured using the bunch structure of synchrotron radiation.
		The multiple-hit capability of the device was used to investigate the effects of K-shell fluorescence of the gas in the detector.
	lbl.confex.com /lbl/sri2003/techprogram/paper_3626.htm (269 words)

	LeCroy Research Systems Model 1877S FASTBUS Time-to-Digital Converter
		At the heart of the 1877S lies the MTD133B Monolithic Time Digitizer, an 8-channel, 16-bit dynamic range TDC circuit with 500 psec least count.
		The charge-to-time converters always generate an output pulse, even at pedestal so that non-zero time data is recorded by the 1877S on every channel.
		Data exceeding these individual thresholds is buffered reducing both the dead time and quantity of data that must be transferred over FASTBUS to the host computer.
	www.lns.cornell.edu /~tom/cleoiii/CC/dsheets/1877s.htm (1605 words)

	Highland V980 VXI Time-to-Digital Converter
		The V980 is a 16-channel time-to-digital converter used to record the time of occurrence of sixteen independent electrical pulse inputs, each measured relative to a single, common reference input.
		Data is available within 200 ns of the completion of the measured time intervals, and the modules may be cleared and rearmed in less than one microsecond.
		The thresholds of the event inputs are adjustable as a group in the range +-2.5 V. Their impedance (high-Z or 50 ohms) and polarity (rising or falling edge) can also be selected individually.
	www.highlandtechnology.com /DSS/V980DS.html (253 words)

	Accurate Time Interval Measurement Electronics for Pulsed Time of Flight Laser Radar (ResearchIndex)
		The time interval between the start and stop pulses is digitized coarsely by counting the 100 MHz clock oscillator pulses.
		The +/-10 ns uncertainty is improved to +/-10 ps by means of an analogue interpolation method based on the discharge of a known capacitance by a constant current.
		1 Digital Time Intervalometer (context) - Nutt - 1968
	citeseer.ist.psu.edu /349300.html (309 words)

	148 (Site not responding. Last check: 2007-11-03)
		Measuring the mass or energy of a particle by timing its flight path is a traditional technique in all branches of high energy physics research.
		Time-to-Digital Converters (TDCs) are used to measure time intervals, where the most critical parameter is the time resolution.
		The TDC will consist of a digital counter for counting high-speed (up to 30 GHz) clock pulses as well as an analog prescaler capable of measuring the time interval within a clock period with up to a 1 ps resolution.
	www.science.doe.gov /sbir/awards_abstracts/sbir/cycle16/phase1/148.htm (277 words)

	LeCroy Model 1176 VME Time-to-Digital Converter
		The module is ideal for time measurements of drift chambers, time projection chambers or other detectors requiring time interval measurements with high accuracy.
		At the end of the acquisition period, the time elapsed between each hit and the Common Stop or Start along with the address of the associated channel is made available for readout.
		By capturing both the leading and trailing edge time information, the 1176 can be used in a "time-over-threshold" technique to simultaneously determine the time and total charge collected (or, in some cases the time and peak value) for a given detector element using only one channel of TDC electronics.
	www.lecroy.com /lrs/dsheets/1176.htm (853 words)

	acam TDC-GP1 Time-to-Digital converter (Site not responding. Last check: 2007-11-03)
		All time difference combinations between the 8 possible results can be calculated.
		If you compare events which arrive on different channels it is possible to measure time intervals down to zero.
		if two stops arrive on the same channel within less than 15 ns the second stop will be ignored since it arrived during the recovery time of the measurement unit.
	www.acam.de /Content/English/gp1/gp1_2.html (207 words)

	VDL Time to Digital Converter
		The VDL Time to Digital Converter chip utilises the vernier delay line (VDL) technique, which allows the achievement of these goals.
		The operation of the VDL is based on the delay line method, where the time resolution is determined by a logic buffer delay.
		The TDC chip works with overall accuracy better than +/-1 LSB for resolutions down to 60 ps, stabilised in the continuously working DLL loop or for resolutions down to 30 ps when the DLL loop is used intermittently to stabilise the delay between measurements, or in averaging mode.
	personalpages.umist.ac.uk /staff/p.dudek/projects/tdc (585 words)

	Gas-Scattering Experiment - Electronics
		The adjusted energy signal is sent to an analog-to-digital converter that changes the voltage spike to a digital signal.
		This total lifetime of the Ps atoms is made into a digital signal that is sent on to the coincidence circuit.
		We can set a time frame in which the arrival of an energy and a lifetime signal will be considered to be simultaneous.
	www.stolaf.edu /academics/positron/gas_electronics.htm (533 words)

	Analog-to-Digital Converter - Model 8715 - CANBERRA, An AREVA Group Company
		Concentric Gain and Range controls together with Digital Offset allow the user to maximize the use of limited MCA memory by selecting only the specific energy range of interest.
		Voltage sampling and subsequent conversion for the Sampled Voltage Analysis mode is initiated by the leading and trailing edges, respectively, of a Gate pulse applied in the Coincidence mode.
		The same LLD and ULD limits are used for acceptance of the peak input during the positive gate time.
	www.canberra.com /products/1109.asp (380 words)

	Highland M680 CAMAC Time-to-Digital Converter
		Ultrastable, ovenized quartz crystal timebase may be checked and calibrated without removing the module form the crate.
		The M680 is an 8-channel time-to-digital converter (TDC) used to record the time of occurrence of eight independent electrical pulse inputs, each channel can time its event "hit" with 1-nanosecond resolution and 28-bit dynamic range.
		Time ranges are doubled (+228 bits) in unipolar mode.
	www.highlandtechnology.com /DSS/M680DS.html (301 words)

	ConvertX - Convert Video into DivX & MPEG
		The ConvertX multi-format encoder chip allows you to capture video straight from your video source and automatically convert it while you are capturing your video.
		Using the ConvertX encoder can save hours of time since it encodes video into the chosen format while you are capturing the video and provides excellent video quality.
		Digital Trendz, LLC disavows any responsibility for product information and products described on our website.
	www.digital-trendz.com /convertx.htm (425 words)

	Selection Guide - Time Digitizers
		A primary consideration is the time span that is needed to cover the minimum to maximum flight times of interest in the TOF-MS.
		To precisely define the peak positions in the spectrum, the digital resolution of the time measurement in the TDC should typically be less than 1/5 the FWHM peak width.
		Better digital time resolution is usually achieved at the expense of pulse-pair resolving time.
	www.sense-dac.com /ms/SysConfigTimeDigitizers.htm (363 words)

	Time-to-Digital Conversion (Site not responding. Last check: 2007-11-03)
		It is possible to digitize relatively long time intervals by incrementing a counter with a repetitive signal derived from an oscillator.
		For short time intervals the time-to-digital converter (TDC) circuit shown in figure 8.8 can be used.
		The resulting voltage on the capacitor is proportional to the time between the START and STOP pulses as shown in figure 8.9.
	www.phys.ualberta.ca /~gingrich/phys395/notes/node168.html (88 words)

Try your search on: Qwika (all wikis)