Dynamic frequency divider circuit with capacitor in loop to achi

Details Dynamic frequency divider circuit with capacitor in loop to achi Dynamic frequency divider circuit with capacitor in loop to achi

1991-05-07

1992-11-10

Heyman, John S.

Electrical pulse counters, pulse dividers, or shift registers: c

Particular transfer means

Including logic circuit

377105, 377111, 377121, H03K 2344

Patent

active

051630745

ABSTRACT:
An improved dynamic frequency divider circuit is disclosed. A DC voltage generating circuit (10) generates a DC voltage (Vcon) having a level the same as a threshold voltage of an inverter. A voltage application circuit (41) supplies a voltage (Vcon) to one electrode of a capacitor through a high frequency signal component cut-off coil (8), and a high frequency signal component is superimposed on the provided DC voltage. Accordingly, an input signal of an inverter (1a) swings around the threshold voltage level as a center, so that the inverter (1a) can provide a signal having the duty cycle of 50% as an output. As a result, the dynamic frequency divider circuit can be prevented from malfunctioning.

REFERENCES:
patent: 3922566 (1975-11-01), Kodama et al.
patent: 4025800 (1977-05-01), Wanlass
patent: 4450369 (1984-05-01), Schuermeyer
patent: 4741005 (1988-04-01), Tanigawa
patent: 4951303 (1990-08-01), Larson
"A 15GHz GaAs Dynamic Prescaler" by Kenji Fujita, Hiroshi Kumanoto, Hitoshi Itoh and Ryuitiro Yamamoto Compound Semiconductor Device Div., NEC Corporation Denki Tsushin Gakkai Ronbunshu ED 88-129, 1988.

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