Electrical pulse counters – pulse dividers – or shift registers: c – Applications – Control
Patent
1991-10-11
1992-12-29
Heyman, John S.
Electrical pulse counters, pulse dividers, or shift registers: c
Applications
Control
377 20, 377 28, 328138, 307518, 371 14, 371 62, 364484, H03K 519, H03M 1300, G06F 1100
Patent
active
051757516
ABSTRACT:
An input to the control unit of a microprocessor places the microprocessor in a WAIT condition whenever the input clock frequency is determined to be less than a predetermined minimum value. A timing circuit which includes a relatively high capacitance device generates a "kill" signal whenever the time interval between successive clock pulses is greater than a value corresponding to a cut-off frequency. The kill signal is applied to the control unit of the microprocessor and cannot be reset except with a system reset.
REFERENCES:
patent: 3757233 (1973-09-01), Dixon
patent: 4326256 (1982-04-01), Furumoto
patent: 4390843 (1983-06-01), Betts et al.
patent: 4428020 (1984-01-01), Blanchard
patent: 4737984 (1988-04-01), Brown
patent: 4882545 (1989-11-01), Plant
Heaney Brad
Hou Andy
Heyman John S.
Intel Corporation
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