Circuit for generating from low voltage edges higher voltage...

Details Circuit for generating from low voltage edges higher voltage... Circuit for generating from low voltage edges higher voltage...

2005-04-05

2005-04-05

Nguyen, Minh (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Clock or pulse waveform generating

C327S112000

Reexamination Certificate

active

06876241

ABSTRACT:
A low voltage source of input edges is AC coupled to positive and negative edge differentiators. Each differentiator briefly drives ON a corresponding normally OFF switch, the pair of which switches serves as an impulse driver and that may be clamped to symmetrical opposing reference voltages. The bi-stable switch driver responds to a particular polarity impulse driver voltage by applying thereto through a load resistor a percentage of a power supply voltage of opposite polarity. The impulse driver is also coupled to a complementary pair of MOSFET switches that are in series between precise reference voltages of opposing polarities, and whose common junction may be connected to a current determining resistance. The output of the MOSFET switches may be assisted by an auxiliary bi-stable output driver that reduces the amount of load current drawn from those MOSFETS.

REFERENCES:
patent: 3160766 (1964-12-01), Reymond
patent: 3751682 (1973-08-01), Howe
patent: 4808845 (1989-02-01), Suzuki et al.
patent: 5677647 (1997-10-01), Knierim

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