Crystal oscillation circuit with voltage regulating circuit

Details Crystal oscillation circuit with voltage regulating circuit Crystal oscillation circuit with voltage regulating circuit

1992-01-10

1993-05-18

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

331158, 331186, H03B 536

Patent

active

052124606

ABSTRACT:
A crystal oscillation circuit has a constant-current load type inverter circuit receiving a regulated supply voltage from a voltage regulating circuit and functioning as an inverting amplifier for oscillation; a feedback circuit connected between an input and an output terminal of the inverter circuit and including a resistor and capacitors; and a crystal resonator connected between the input and output terminals of the inverter circuit. The inverter circuit is formed by a constant-current source and a P-channel type MOS-FET or an N-channel type MOS-FET. As the supply voltage from the voltage regulating circuit necessary as an oscillation starting voltage can be set at a low level, the current consumption of the overall oscillation circuit can be effectively reduced.

REFERENCES:
patent: 4208639 (1980-06-01), Stickel
patent: 4956618 (1990-09-01), Ulmer

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