This article is about the type of electronic circuit. For other uses, see Sample and hold (disambiguation).
A simplified sample and hold circuit diagram. AI is an analog input, AO — an analog output, C — a control signal.Sample times.Sample and hold.A sample-and-hold integrated circuit (Tesla MAC198)
In electronics, a sample and hold (also known as sample and follow) circuit is an analog device that samples (captures, takes) the voltage of a continuously varying analog signal and holds (locks, freezes) its value at a constant level for a specified minimum period of time. Sample and hold circuits and related peak detectors are the elementary analog memory devices. They are typically used in analog-to-digital converters to eliminate variations in input signal that can corrupt the conversion process.[1] They are also used in electronic music, for instance to impart a random quality to successively-played notes.
A typical sample and hold circuit stores electric charge in a capacitor and contains at least one switching device such as a FET (field effect transistor) switch and normally one operational amplifier.[2] To sample the input signal, the switch connects the capacitor to the output of a buffer amplifier. The buffer amplifier charges or discharges the capacitor so that the voltage across the capacitor is practically equal, or proportional to, input voltage. In hold mode, the switch disconnects the capacitor from the buffer. The capacitor is invariably discharged by its own leakage currents and useful load currents, which makes the circuit inherently volatile, but the loss of voltage (voltage drop) within a specified hold time remains within an acceptable error margin for all but the most demanding applications.
In electronics, a sampleandhold (also known as sampleand follow) circuit is an analog device that samples (captures, takes) the voltage of a continuously...
SampleandHold is a remix album by English electronic music duo Simian Mobile Disco. It was released on 28 July 2008 on Wichita Recordings. The track...
the diode leakage. Schottky diodes can be used in diode-bridge based sampleandhold circuits. When compared to regular p–n junction based diode bridges...
the film), and common in miniaturized camera sensors that require more light. Blur from eye tracking fast-moving objects on sample-and-hold LCD, plasma...
Productions (MLP) record label. The album SampleandHold was recorded for Virgin Records in 1983 by Haycock, Cooper, and George Glover, with a rhythm section...
5. ENOB is also used as a quality measure for other blocks such as sample-and-hold amplifiers. Thus analog blocks may be included in signal-chain calculations...
cost) and a wide variety of sounds and modulation effects are possible. The Rogue also includes a Sample-and-Hold feature that the Prodigy does not. The...
oscillator with triangle, square, and random waveforms extensive modulation routing options, including sample-and-hold, audio-frequency modulation of the...
high-pass filter, ADSR and AR envelopes, a sine and square wave LFO, and a sample-and-hold function are controllable with sliders and switches on the front...
duplicate images. Any flicker on sampleandhold technologies such as LCD or OLED, is unrelated to refresh rate and far less conspicuous, instead coming...
DVMs (especially some early designs) would vary over the course of a sample-and-hold internal measurement cycle, causing disturbances to some sensitive...
sampling a continuous signal at discrete time intervals. Digital control Finite-state machine Frequency spectrum Mathematical model Sampleandhold Sample...
based on electronic devices such as sampleandhold circuits, analog time-division multiplexers, analog delay lines and analog feedback shift registers....
any pressure and often have the ability to detect tool tilt and rotation as well. Touch and tablet sensors are often used on sampleandhold displays such...
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