All-pass filter circuit

Details All-pass filter circuit All-pass filter circuit

2006-06-13

2006-06-13

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

C327S552000

Reexamination Certificate

active

07061310

ABSTRACT:
An all-pass filter circuit includes a first terminal to which an input signal is input, a capacitor having a first electrode connected to the first terminal and a second electrode, a current amplifier circuit which is configured by MOS transistors, has an input terminal connected to the second electrode and supplied with a first signal output from the capacitor, and outputs a second signal based on conductance thereof, a second terminal to which a control signal for controlling the conductance is input, and an adder circuit which is configured by MOS transistors and adds the second signal and input signal together to output a third signal.

REFERENCES:
patent: 3633122 (1972-01-01), Braga
patent: 4518878 (1985-05-01), Moulding
patent: 5258716 (1993-11-01), Kondo et al.
patent: 6194959 (2001-02-01), Kamoshida et al.
patent: 2000-261289 (2000-09-01), None
Klaas Bult, et al., “A CMOS Analog Continuous-Time Delay Line with Adaptive Delay-Time Control”, IEEE.J Solid-State Circuits, vol. SC-23, No. 3, 8 Pages, June 1988.

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