Track and hold circuit

Details Track and hold circuit Track and hold circuit

1992-06-23

1994-05-24

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307359, 307491, G11C 2702

Patent

active

053151704

ABSTRACT:
A track and hold circuit for producing an output voltage having a level related to the voltage level of an input voltage fed to the circuit during a track mode and for maintaining the level of the output voltage constant during a hold mode. The circuit includes a current source and a capacitor with the capacitor being charged with the current or discharged selectively in accordance with the level of the input voltage relative to the level of the output voltage to produce at the capacitor the voltage related to the voltage level of the input voltage. Current from the current source is directed away from the capacitor during the hold mode in order to reduce the effect of charge stored during the track mode from slowing the transition from track mode to hold mode operation.

REFERENCES:
patent: 5124576 (1992-06-01), Jensen
patent: 5130572 (1992-07-01), Stitt et al.
RLA IC Design Manual, 1989, pp. 3-27, 3-28, Chapter Three. "Transistor-Based Sample/Hold".

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