Clock generator control circuit

Details Clock generator control circuit Clock generator control circuit

1992-03-06

1994-11-29

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Clock or pulse waveform generating

377107, 377111, 377114, 327291, 327178, 327143, 327546, 326 14, G11C 500, H03K 513, H03K 19007, H03K 2138

Patent

active

053693116

ABSTRACT:
A controller for a clock generator. The controller of the present invention enables a clock signal to the internal clocking mechanism of a device. The controller of the present invention includes a detector and a timer. The detector has two input sense levels, such that it is capable of detecting a clock signal at two separate levels, the first level being larger than the second. Initially, the detector only detects when the clock signal is at a level greater than or equal to the larger of the levels. When this occurs, the timer begins counting. When the clock signal has been at or above the greater level for a predetermined time as determined by the timer, the detector enables the clock signal to go to the internal clocking mechanism. Thereafter, the detector only senses when the clock signal falls below the second level. Thus, the detector enables the clock signal to go to the internal clocking mechanism while the level of the clock signal is above the second level.

REFERENCES:
patent: 4788454 (1988-11-01), Tanagawa et al.
patent: 4975593 (1990-12-01), Kurakazu et al.
patent: 5065042 (1991-11-01), Thomsen et al.
patent: 5065047 (1991-11-01), Igari et al.
patent: 5070257 (1991-12-01), Farwell
patent: 5140183 (1992-08-01), Takenaka
patent: 5159217 (1992-10-01), Mortensen et al.
patent: 5173617 (1992-12-01), Alsup et al.
patent: 5175453 (1992-12-01), Chang et al.

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