Signal generators for current-mode three-level digital...

Details Signal generators for current-mode three-level digital... Signal generators for current-mode three-level digital...

2007-12-11

2009-06-23

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including class d amplifier

C330S010000, C330S20700P

Reexamination Certificate

active

07551028

ABSTRACT:
Apparatus having corresponding methods comprise: a first fixed current source to produce a first fixed current; a second fixed current source to produce a second fixed current; a first adjustable current source to produce a first adjustable current; a first switch to deliver the first fixed current and the first adjustable current to a first output node when the first switch is closed; a second switch to deliver the second fixed current to the first output node when the second switch is closed; and an adjustment circuit to adjust the first adjustable current according to the first fixed current, the second fixed current, and the adjustable current.

REFERENCES:
patent: 6791405 (2004-09-01), Tsuji et al.
patent: 7230485 (2007-06-01), De Cremoux et al.
patent: 7312657 (2007-12-01), Kurokawa
patent: 7453316 (2008-11-01), Shimizu

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