Integrated circuit with switched capacitor

Details Integrated circuit with switched capacitor Integrated circuit with switched capacitor

1998-11-13

2000-10-17

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific input to output function

By integrating

327554, 327558, 333173, G06F 764

Patent

active

061337757

ABSTRACT:
A switched capacitor wherein one of the plates of the capacitor to be switched is fed with the input signal via a transistor switch receiving as control signal at the gate thereof a pulse train with predetermined frequency. For compensating the parasitic capacitance of the transistor switch, a compensation component is located between the transistor switch and the capacitor to be switched. This compensation component is formed as an incomplete transistor structure, such as only 1/2 of a transistor, has a drain region in common with transistor switch and has an insulated gate. The parasitic capacitance of the compensation component thus is established mainly by the capacitance between the insulated gate and the drain region and thus corresponds to the parasitic capacitance of the transistor switch, whereby complete compensation with optimized charge transfer is achieved.

REFERENCES:
patent: 4344050 (1982-08-01), Callahan
patent: 4468798 (1984-08-01), Riebeek
patent: 4543534 (1985-09-01), Temes et al.

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