Oscillator device generating signals of different cycles

Details Oscillator device generating signals of different cycles Oscillator device generating signals of different cycles

1997-06-30

1998-12-01

Mottola, Steven

Oscillators

Ring oscillators

331 46, 331 49, H03K 3353

Patent

active

058444475

ABSTRACT:
An oscillating device is disclosed including a first ring oscillator having at least three odd inverters connected in series, an input terminal of the first of the inverters being connected with an output terminal of the last of the inverters, and applying an output signal of the last inverter to a first buffer's input terminal, thus producing a signal of the first cycle; the first buffer connected with the output terminal of the first ring oscillator's last inverter, having at least two even inverters connected in series, and buffering an output signal of the last inverter to produce it to outside; a second ring oscillator having at least three odd delay devices connected in series, wherein a power supply of each delay device is connected with the output terminal of each of the first ring oscillator's corresponding inverters, and an output terminal of the last of the delay devices is connected with an input terminal of the first of the delay devices, thus producing a signal of the second cycle, larger than the first cycle, to an input terminal of a second buffer; and the second buffer connected with the output terminal of the second ring oscillator's last delay device, having at least two even inverters connected in series, and buffering an output signal of the last delay device.

REFERENCES:
patent: 3740660 (1973-06-01), Davies, Jr.
patent: 5446418 (1995-08-01), Hara et al.

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