Level shifting low to high supply voltage interface circuit

Details Level shifting low to high supply voltage interface circuit Level shifting low to high supply voltage interface circuit

1993-10-27

1995-04-11

Westin, Edward P.

Electronic digital logic circuitry

Interface

Logic level shifting

326121, H03K 190175, H03K 19094

Patent

active

054061423

ABSTRACT:
When the input signal IN1 changes from a ground voltage GND to a first voltage -E1 and from the first voltage -E1 to the ground voltage GND, the output potential of the -E2 system flip-flop circuit changes gradually. The inverted signal from the -E1 system inverter circuit is supplied to the -E2 system inverter circuit earlier than the output signal (high-potential signal) of the -E2 system flip-flop circuit. This eliminates a period of time when all the MOSFETs in the -E2 system inverter circuit turn on simultaneously, thereby reducing a through current in the -E2 system inverter circuit. Consequently, the circuit operation can be stabilized by decreasing through currents flowing in the -E1 system inverter circuit and the -E2 system inverter circuit using the output signal of the -E2 system flip-flop circuit as an input.

REFERENCES:
patent: 4897567 (1990-01-01), Bacrania
patent: 4998028 (1991-03-01), Chappell et al.
patent: 5115434 (1992-05-01), Aizaki
patent: 5136190 (1992-08-01), Chern et al.
patent: 5204557 (1993-04-01), Nguyen

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