Triangular wave generation circuit

Details Triangular wave generation circuit Triangular wave generation circuit

2008-07-22

2008-07-22

Richards, N. Drew (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Generating sawtooth or triangular output

C323S242000, C323S288000, C323S326000

Reexamination Certificate

active

11513545

ABSTRACT:
A first constant-current source supplies a charging current to a second terminal of a first capacitor in which a first terminal is grounded. A first terminal of a second capacitor is grounded, and a first switch is provided between the second terminal of the first capacitor and a second terminal of the second capacitor. A second constant-current source supplies current to the second capacitor, and a second switch is provided on a current path of the second constant-current source. A third constant-current source draws out current from the first capacitor and the second capacitor. A switch controller turns on the first switch and turns off the second switch when an output voltage appearing in the second terminal of the first capacitor reaches a predetermined upper-limit voltage. The switch controller turns off the first switch and turns on the second switch when the output voltage drops to a predetermined lower-limit voltage.

REFERENCES:
patent: 2007/0052459 (2007-03-01), Ikezawa
patent: 2001-345682 (2001-12-01), None
patent: 2004-072657 (2004-03-01), None

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