Balanced type differential integrating circuit
AssigneeSharp Kabushiki Kaisha
InventorHiroshi Yamaguchi
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Abstract
A balanced type differential amplifier circuit including a mutual-conductance differential amplifier circuit having two differential output terminals, a constant-current circuit for supplying an operating current to the mutual-conductance differential amplifier circuit, two resistors connected in series across the two differential output terminals in order to detect an in-phase component of output voltages of the two differential output terminals, and a circuit for adjusting a value of the operating current supplied by the constant-current circuit according to the value of the detected in-phase component.
Claims6
A differential integrating circuit comprising:
- a mutual-conductance differential amplifier circuit having two differential output terminals;
- first and second capacitors, respectively coupled to outputs of said mutual-conductance differential amplifier circuit, for converting the outputs into integral outputs;
- first and second buffers, respectively coupled to said first and second capacitors, for converting said integral outputs into respective voltage signals;
- a constant-current circuit for supplying an operating current to said mutual-conductance differential amplifier circuit;
- means for detecting an in-phase component of said voltage signals;
- and
- means for adjusting a value of the operating current supplied by said constant-current circuit according to a value of the in-phase component detected.
Dependencies are inferred from the claim text.