Integratable DC blocking circuit
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United States of America Patent
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Feb 14, 1995
Grant Date -
N/A
app pub date -
Mar 3, 1993
filing date -
Mar 3, 1993
priority date (Note) -
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status (Latency Note)
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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).
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