Differential DC offset compensation circuit
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United States of America Patent
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Nov 28, 1995
Grant Date -
N/A
app pub date -
Oct 18, 1994
filing date -
Oct 18, 1994
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A differential direct current (DC) offset compensation circuit for providing DC offset compensation to a circuit device (110). The DC offset compensation circuit (100) comprises a differential integrator (120) and a summing network (130). The circuit device (110) is one of several types of devices, such as a DC coupled amplifier. The differential input (112) of the circuit device (110) is suitable for coupling to a differential input source (140) and the differential output (114) of the circuit device is suitable for connection to a load (150). The differential integrator (120) features a transconductance amplifier (18) at least one other amplifier (13), and a capacitor element (16) having a capacitance of C1. The summing network (130) sums the differential integrator output with the differential input signals of the differential input source (140) and cancels DC offsets of the differential input source (140) and the circuit device (110).
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