Device for generating a periodic clock signal

Details Device for generating a periodic clock signal Device for generating a periodic clock signal

2006-11-08

2008-12-09

Mis, David (Department: 2817)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Clock or pulse waveform generating

C375S354000

Reexamination Certificate

active

07463077

ABSTRACT:
A device for generating a periodic clock signal according to the invention comprises a bandpass filter is disclosed. In one embodiment, the bandpass filter includes a bandpass filter input for receiving an input signal and a bandpass filter output for outputting a bandpass filter signal. The device includes further a comparator. A comparator has at least one comparator input receiving the bandpass filtered signal and a comparator output for outputting the clock signal. The comparator is adapted to output a first signal level at the comparator output, if the bandpass filtered signal exceeds a reference level. A zero crossing of the bandpass filtered signal may be used as reference level. A second signal level is output at the comparator output if the bandpass filter signal falls below the reference level. The output signal of the comparator is the clock signal.

REFERENCES:
patent: 5396217 (1995-03-01), Proefke et al.
patent: 5426392 (1995-06-01), Kornfeld
patent: 5754356 (1998-05-01), Honjo et al.
patent: 59146216 (1984-08-01), None

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