Leakage independent very low bandwith current filter

Details Leakage independent very low bandwith current filter Leakage independent very low bandwith current filter

2011-01-11

2011-01-11

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

07868688

ABSTRACT:
A current filter circuit is provided. The current filter circuit comprises a source transistor comprising a drain, a gate, and a source. The source of the source transistor is coupled to a reference voltage terminal, the gate of the source transistor is coupled to the gate of a mirror transistor, and the drain of the source transistor is coupled to a reference current source. The mirror transistor comprises a drain, a gate, and a source. The source of the mirror transistor is coupled to the reference voltage terminal, the gate is coupled to the gate of the source transistor, and the drain is coupled to a load. The current filter circuit comprises a low pass filter for filtering noise. The current filter circuit also comprises an impedance reduction circuit coupled to the drain of the mirror transistor for reducing bandwidth of the current filter circuit.

REFERENCES:
patent: 5444579 (1995-08-01), Klein et al.
patent: 5572161 (1996-11-01), Myers
patent: 6788161 (2004-09-01), Vilander
patent: 7119605 (2006-10-01), Eberlein
patent: 7184253 (2007-02-01), Hartranft et al.
patent: 7218170 (2007-05-01), Carter et al.

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