Track-and-hold circuit

Details Track-and-hold circuit Track-and-hold circuit

1992-08-31

1994-03-29

Kwon, John T.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307494, G11C 2702

Patent

active

052988015

ABSTRACT:
A track-and-hold circuit includes an input stage (IS), an output stage (OS) and a switching stage (SS). The switching stage is coupled between the input stage and the output stage. The switching stage includes a switching transistor (T10), a differential amplifier (T11/T12), a current source (T13/R11), and a capacitor (C11). In order to improve the frequency response, the input stage is provided with a passive impedance coupled between a base of the switching transistor and a first supply terminal (1) and the input stage is adapted to supply a signal current to the base of the switching transistor. This signal current is related to an input signal applied to the input stage. The output stage includes a first output transistor (T14), a first current source (T15) switched by a tracking signal (Vt), a second output transistor (T16), and a second current source.

REFERENCES:
patent: 4617474 (1986-10-01), Jason
patent: 4721865 (1988-01-01), Tallaron et al.
patent: 5039878 (1991-08-01), Armstrong et al.
patent: 5047666 (1991-09-01), Astegher et al.
patent: 5134309 (1992-07-01), Matsumoto et al.
patent: 5134318 (1992-07-01), Itoh
patent: 5168209 (1992-12-01), Thiel, V
patent: 5223743 (1993-06-01), Nakagawara

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