Triangular wave generating circuit, and charging and...

Details Triangular wave generating circuit, and charging and... Triangular wave generating circuit, and charging and...

2011-03-01

2011-03-01

Pascal, Robert (Department: 2817)

Oscillators

Solid state active element oscillator

Transistors

C331S143000

Reexamination Certificate

active

07898349

ABSTRACT:
A charging and discharging circuit of a triangular wave oscillation circuit includes an inverter circuit; a discharging reference potential generating circuit; a first NMOS transistor having a drain connected with a connection point between a first current source circuit and the capacitor, and a gate connected with the discharging reference potential generated by the discharging reference potential generating circuit; a second NMOS transistor having a gate inputted with the switching signal through the inverter circuit, a drain connected with the gate of the first NMOS transistor, and a source connected with a source of the first NMOS transistor; and a third NMOS transistor having a gate inputted with the switching signal, a drain connected with a connection point between the source of the first NMOS transistor and the source of the second NMOS transistor, and a source grounded.

REFERENCES:
patent: 5638031 (1997-06-01), Danstrom
patent: 6271735 (2001-08-01), Halamik et al.
patent: 2004253868 (2004-09-01), None

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