Level shifting circuit

Details Level shifting circuit Level shifting circuit

1996-06-04

1998-03-03

Hudspeth, David R.

Electronic digital logic circuitry

Interface

Supply voltage level shifting

326 63, 326 80, H03K 190185

Patent

active

057239860

ABSTRACT:
A level shifting circuit has a high-level shifter connected to a first high voltage and to a first low voltage, for amplifying the peak voltage of an input signal; a low-level shifter connected to a second high voltage lower than the first high voltage and to a second low voltage lower than the first low voltage, for amplifying the trough voltage of the input signal; a high-voltage controlling transistor connected to the first high voltage and to an output node and turned on and off according to the output of the high-level shifter; and a low-voltage controlling transistor connected to the output node and to the second low voltage and turned on and off according to the output of the low-level shifter complementarily to the high-voltage controlling transistor. The level shifting circuit is capable of amplifying both the peak and trough voltages of an input signal.

REFERENCES:
patent: 4504747 (1985-03-01), Smith et al.
patent: 4833350 (1989-05-01), Frisch
patent: 5329185 (1994-07-01), Cooperman et al.
patent: 5426381 (1995-06-01), Flannagan et al.
patent: 5467313 (1995-11-01), Jung et al.
patent: 5585743 (1996-12-01), Kenji et al.

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