Emulator circuit and method for generating CMOS level clock inpu

Details Emulator circuit and method for generating CMOS level clock inpu Emulator circuit and method for generating CMOS level clock inpu

1991-08-13

1993-04-06

Ng, Jin F.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328 35, 307261, H03K 500, H03K 508

Patent

active

052006484

ABSTRACT:
A method and apparatus for generating a CMOS level clock signal from RC components for use in a microcontroller. The emulator includes an emulation chip and an emulation circuit. The emulation chip includes means for supporting RC clock input to accurately produce a sawtooth wave signal at the point of its connection with the RC network. The emulation circuit includes a comparator which transforms a sawtooth waveform produced by the emulation chip into a square waveform which is then inverted for use as a clock signal for a CMOS level microcontroller. The method includes the steps of emulating a clock signal input of an RC network, comparing the emulated RC signal to a reference signal to generate inverted square wave form output, and inverting the square wave form output for transformation into a CMOS level clock input suitable for use as a clock input for microcontrollers.

REFERENCES:
patent: 4638255 (1987-01-01), Penney
patent: 5030847 (1991-07-01), Gotoh et al.
patent: 5036226 (1991-07-01), Tonnu et al.

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