Operational transconductance amplifier track and hold system

Details Operational transconductance amplifier track and hold system Operational transconductance amplifier track and hold system

1993-11-10

1996-01-09

Urban, Edward F.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455265, 327 91, H04B 118

Patent

active

054836875

ABSTRACT:
A voltage track and hold circuit operates to track a tuning voltage and holding the tuning voltage (404) as a reference voltage (408). In the track mode, the track and hold circuit includes a first operational transconductance amplifier (401) and a first charge storage device (402) coupled to a first input (403) of the first operational transconductance amplifier (401). The first charge storage device (402) accumulates a charge that corresponds with the tuning voltage (404). A second charge storage device (405) is coupled to a second input (406) and an output (407) of the first operational transconductance amplifier (401). The second charge storage device (405) accumulates a reference charge such that the reference voltage (408) present at the second charge storage device (405) is substantially equivalent to the tuning voltage (404).

REFERENCES:
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patent: 5170497 (1992-12-01), Uchikura
patent: 5175729 (1992-12-01), Borras et al.

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