Pulse generator

Details Pulse generator Pulse generator

1994-12-23

1995-12-19

Mis, David

Oscillators

Single oscillator with plural output circuits

331 1A, 331 25, 331 46, 331 57, 327 42, 327158, 327159, H03B 2700, H03L 7083, H03L 718, H03K 526

Patent

active

054771960

ABSTRACT:
In a device for encoding a pulse phase difference or controlling an oscillation frequency based on delayed signals sequentially output by a delay circuit, the encoding of a pulse phase difference or the oscillation control can be simultaneously performed using a single delay device. There is provided a frequency converter including a ring oscillator consisting of inverting circuits interconnected in the form of a ring, a pulse phase difference encoding circuit for encoding the cycle of a reference signal into a binary digital value based on a pulse output by the ring oscillator, an arithmetic circuit for multiplying or dividing the binary digital value by a predetermined value to generate control data and a digitally controlled oscillation circuit for generating a pulse signal in a cycle in accordance with the control data based on the pulse output by the ring oscillator, the ring oscillator being shared by the encoding circuit and oscillation circuit. This makes the time resolution of the encoding and oscillation circuits constant, thereby allowing accurate frequency conversion.

REFERENCES:
patent: 4771251 (1988-09-01), Allen et al.
patent: 5045811 (1991-09-01), Lewis
patent: 5126691 (1992-06-01), Mijuskovic
patent: 5128624 (1992-07-01), Hoshino et al.
patent: 5134371 (1992-07-01), Watanabe et al.
patent: 5225795 (1993-07-01), Iinuma
patent: 5289135 (1994-02-01), Hoshino et al.
patent: 5331294 (1994-07-01), Watanabe et al.
patent: 5416444 (1995-05-01), Yamauchi et al.

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