Switched capacitor filter utilizing a differential input and out

Details Switched capacitor filter utilizing a differential input and out Switched capacitor filter utilizing a differential input and out

1985-05-28

1986-07-08

LaRoche, Eugene R.

Amplifiers

Signal feedback

Phase shift means in loop path

330 9, 330 51, 330252, H03F 114

Patent

active

045995737

ABSTRACT:
An integrated circuit employing a differential amplifier and switched capacitor networks to provide filtering techniques. The differential amplifier utilizes a feedback circuit between its inputs and outputs. A switched capacitor network coupled to the inputs of the amplifier and a second switched capacitor network coupled to the outputs of the amplifier provide the requisite filtering necessary for analog-to-digital encoding or digital-to-analog decoding. The differential configuration allows for less noise and better power supply rejection, whereby allowing for a higher signal-to-noise ratio.

REFERENCES:
patent: 4453130 (1984-06-01), Bennett
Jacobs, G. M., "Practical Design Considerations for MOS Switched Capacitor Ladder Filters", UCB-ERL, Nov. 11, 1977.
Gregorian, R., "Filtering Techniques W/Switched-Capacitor Circuits", Microelectronics Journal, vol. 11, No. 2, 1980, pp. 13-20.

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