I/V converter circuit and D/A converter

Details I/V converter circuit and D/A converter I/V converter circuit and D/A converter

2005-07-12

2005-07-12

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C327S103000

Reexamination Certificate

active

06917322

ABSTRACT:
In an I/V converter circuit and a D/A converter, a wide pass band for signal can be obtained and current consumption can be reduced. A current is supplied through an input terminal to a first node, and a first bias current is supplied from a first bias-current generating circuit to the first node. The current supplied to the first node is mirrored to a second node, and a second bias current is supplied from a second bias-current generating circuit to the second node. A first control circuit controls first and second elements of a current mirror circuit so that the voltage of the first node is substantially equal to a bias voltage, a third element converts a current flowing therethrough to a voltage by using the bias voltage as reference, and a second control circuit controls the voltage output from an output terminal so that the voltage of the second node is substantially equal to the bias voltage.

REFERENCES:
patent: 4982192 (1991-01-01), Murooka
patent: 5694033 (1997-12-01), Wei et al.
patent: 6002354 (1999-12-01), Itoh et al.
patent: 6259302 (2001-07-01), Phanse et al.
patent: 6504736 (2003-01-01), Ono
patent: 6522175 (2003-02-01), Ueno et al.
patent: 6605993 (2003-08-01), Suzuki
patent: 0641069 (1993-08-01), None
patent: 2002-118468 (2002-04-01), None

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