CMOS Schmitt-trigger circuit

Details CMOS Schmitt-trigger circuit CMOS Schmitt-trigger circuit

1980-07-11

1983-01-18

Anagnos, Larry N.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307290, H03K 3356, H03K 3037

Patent

active

043693814

ABSTRACT:
A CMOS Schmitt-trigger circuit for shaping the wave form of an input signal to be applied to logic circuits, such as flip-flops, counters, etc. The CMOS Schmitt-trigger circuit has an input terminal connected to a signal source, and comprises a first CMOS inverter, a second CMOS inverter connected in cascade to the first CMOS inverter, a third CMOS inverter connected in cascade to the second CMOS inverter, and a feedback resistance connected between the output end of the third CMOS inverter and the input end of the second CMOS inverter. The schmitt width of the CMOS Schmitt inverter according to the present invention has less dependency on the impedance of the input signal source than the prior-art devices do.

REFERENCES:
patent: 3835336 (1974-09-01), Block
patent: 3855549 (1974-12-01), Huener et al.
patent: 3873856 (1975-03-01), Gerlach et al.
patent: 3882331 (1975-05-01), Sasaki
patent: 3984703 (1976-10-01), Jorgensen
patent: 4025800 (1977-05-01), Wanlass

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