Differential filter circuit and integrated circuit structure the

Details Differential filter circuit and integrated circuit structure the Differential filter circuit and integrated circuit structure the

1996-09-25

1998-09-29

Pascal, Robert J.

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

333184, 333185, 257533, H03H 102, H03H 706

Patent

active

058150510

ABSTRACT:
Differential filters for removing both normal-mode and common-mode noises are provided. A first-order differential low pass filter is composed of a first resistor connected between a first input terminal and a first output terminal, a second resistor having the same resistance value as the first resistor and connected between a second input terminal and a second output terminal, a first capacitor connected between the first output terminal and a reference potential, a second capacitor having the same capacitance value as the first capacitor and connected between the second output terminal and the reference potential, and a third capacitor connected between the first output terminal and the second output terminal.

REFERENCES:
patent: 4553050 (1985-11-01), Feinberg et al.
patent: 4641165 (1987-02-01), Iizuka et al.
patent: 4994693 (1991-02-01), Popescu
patent: 5179362 (1993-01-01), Okochi et al.
patent: 5420553 (1995-05-01), Sakamoto et al.
Logemann, Jr. "High Pass Filter and Switch Circuit for Eliminating Spurious Components from a Television Video Signal as used in an Automatic Data Processing System," Technical Notes, RCA, TN No.: 994, pp. 1-2, Jan. 1975.
Detailed circuit diagram of a filter circuit included in the PCM1710U shown on the data sheet submitted as prior art on Jan. 23, 1997.
Data Sheet for the PCM1710U Dual Voltage Output CMOS Delta-sigma DAC with On-Chip Filter, Burr-Brown Japan, Ltd., Apr., 1994, pp. 1-16.

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