Integratable DC blocking circuit

Details Integratable DC blocking circuit Integratable DC blocking circuit

1993-03-03

1995-02-14

Sikes, William L.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

327551, 327552, 327553, H03F 134, H03K 508, H04L 2506

Patent

active

053898397

ABSTRACT:
An electronic circuit (100) includes an output (110) and a filter circuitry (104, 106 and 108) coupled across this forward transmission path is a feedback loop having an error amplifier (112) and a coupling amplifier (116). Switches (118, 120, 122, and 124) are situated around the error amplifier to form an auto zero circuit. A capacitor (114) in conjunction with the error amplifier (112) provides an integrator for the circuit (100). The auto zero circuit allows the output (110) to follow a desired DC voltage namely (VAG) independent of the offset voltage of the error amplifier (112) or the coupler amplifier (116).

REFERENCES:
patent: 4334185 (1982-06-01), Turney et al.
patent: 4377759 (1983-03-01), Ohhata et al.
patent: 4852126 (1989-07-01), Tanaka et al.
IEEE Journal of Solid State Circuits, vol. 24, No. 3, pp. 651-658 published Jun. 1989.

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