Timer oscillation circuit with comparator clock control signal s

Details Timer oscillation circuit with comparator clock control signal s Timer oscillation circuit with comparator clock control signal s

1997-01-31

1997-12-23

Pascal, Robert

Oscillators

Relaxation oscillators

With sync, trigger or pulsing circuit

331143, 331111, 331177R, 327141, 327144, 327135, 326 96, H03K 3023

Patent

active

057011052

ABSTRACT:
An improved timer oscillation circuit capable of synchronizing an oscillation frequency, which is determined by a time constant of a resistance and a capacitance, to a clock signal, which includes a first voltage comparator, controlled by a clock signal, for charging a first voltage on a second capacitance and for outputting a result obtained by comparing the charged voltage on the second capacitance and a voltage from the first capacitance; and a second voltage comparator, controlled by the clock signal, for charging a voltage outputted from the first capacitance on a third capacitance and for outputting a result by comparing the charged voltage and an electric potential of the second voltage, so that it can be advantageously adopted to a digital circuit by outputting an oscillation signal having a cycle determined by a time constant of a resistance and a capacitance and which is synchronized to a clock signal.

REFERENCES:
patent: 3745367 (1973-07-01), Schindler et al.
patent: 4017747 (1977-04-01), Sheng
patent: 4590444 (1986-05-01), Wilcox
patent: 5302869 (1994-04-01), Hosotani et al.
patent: 5481161 (1996-01-01), El-hamamsy et al.
patent: 5565819 (1996-10-01), Cooper

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