High resolution, large multiplication factor digitally-controlle

Oscillators – Solid state active element oscillator – Transistors

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331 1A, 331 16, 331 25, 331 34, 331143, 331179, 327 42, 327 43, 327107, 327155, 327160, 455260, H03B 524, H03L 718

Patent

active

055921299

ABSTRACT:
A frequency multiplier circuit generates an supplemental high-frequency timing signal from a single, low-frequency current-controlled oscillator (CCO). The current-controlled oscillator (CCO) generates a controlled discharge current and a controlled bias current which are controlled in parallel to substantially eliminate inaccuracies in a characteristic frequency-current curve of the current-controlled oscillator. The frequency multiplier circuit generates a high-frequency timing signal using the digitally-controlled CCO and avoids the usage of a phase-locked loop (PLL) technique. Specifically, a frequency multiplier includes a current-controlled oscillator having a plurality of input lines connected to receive a digital current select signal and having an output terminal connected to carry a timing signal at a current-controlled oscillator frequency f.sub.CCO set in accordance with the current select signal. The frequency multiplier further includes a control circuit having a first timing input terminal connected to the current-controlled oscillator output terminal to receive the current-controlled oscillator frequency f.sub.CCO, output lines connected to the current-controlled oscillator digital current select input lines, a second timing input terminal connected to receive a timing signal at a reference frequency f.sub.REF, and a plurality of input lines connected to receive a programmable frequency multiplication factor.

REFERENCES:
patent: 3681706 (1972-08-01), Harzer
patent: 4103251 (1978-07-01), Glick
patent: 4446446 (1984-05-01), Fowks
patent: 4533880 (1985-08-01), Geurts
patent: 4639692 (1987-01-01), Kitaguchi
patent: 4670718 (1987-06-01), Geurts
patent: 4723114 (1988-02-01), D'Arrigo et al.
patent: 4742315 (1988-05-01), Schreilechner
patent: 4888564 (1989-12-01), Ishigaki
patent: 4906944 (1990-03-01), Frerking
patent: 5182528 (1993-01-01), Zuta
patent: 5257294 (1993-12-01), Pinto et al.
patent: 5315270 (1994-05-01), Leonowich
patent: 5416446 (1995-05-01), Holler, Jr. et al.
patent: 5459437 (1995-10-01), Campbell

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