Oscillators – Automatic frequency stabilization using a phase or frequency... – Afc with logic elements
Patent
1992-12-21
1994-04-12
Pascal, Robert J.
Oscillators
Automatic frequency stabilization using a phase or frequency...
Afc with logic elements
331 11, 331 17, 331 27, 307514, 307526, 328134, H03L 700
Patent
active
053029160
ABSTRACT:
An integrated circuit for generating an oscillator clock signal based on a reference clock signal includes a wide band digital frequency detector. The wide band digital frequency detector includes a first shift register clocked by the reference clock signal and a second shift register clocked by the oscillator clock signal. A third shift register receives as an input the output from the first shift register and is clocked by the output of the second shift register. The third shift register provides a first oscillator control output. A fourth shift register receives a phase of the reference clock signal as an input and is clocked by the oscillator clock signal to provide a second oscillator control output. In an alternate embodiment, the first oscillator control output is coupled as the up-down control input of an up-down counter and the second oscillator control output is coupled as the clock input to the up-down counter to control the oscillator clock frequency.
REFERENCES:
patent: 3271688 (1966-09-01), Gschwind et al.
patent: 3562661 (1971-02-01), Crumb et al.
patent: 3824483 (1974-07-01), Margala et al.
patent: 3825855 (1974-07-01), Basset et al.
patent: 4017806 (1977-04-01), Rogers
patent: 4077016 (1978-02-01), Sanders et al.
patent: 4151463 (1979-04-01), Kibler
patent: 4151485 (1979-04-01), La Fratta
patent: 4456890 (1984-06-01), Carickhoff
patent: 4590440 (1986-05-01), Haque et al.
patent: 4902920 (1990-02-01), Wolaver
patent: 4929918 (1990-05-01), Chung et al.
patent: 5168245 (1992-12-01), Koskowich
AT&T Bell Laboratories
Kinkead Arnold
Pascal Robert J.
Smith David L.
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