Smart current controlled (SCC) resonator driver

Details Smart current controlled (SCC) resonator driver Smart current controlled (SCC) resonator driver

2006-05-02

2006-05-02

Mis, David (Department: 2817)

Oscillators

Solid state active element oscillator

Transistors

C331S1160FE, C331S154000, C331S158000, C331S183000

Reexamination Certificate

active

07038550

ABSTRACT:
A circuit and a method are given, to realize and implement an oscillator circuit with a Smart Current Controlled (SCC) Resonator Driver. A newly introduced controlled current source for a crystal oscillator's amplifier element produces a controlled driving current for the resonator element during operation in both phases of the oscillation cycle to reach for low phase noise and reduced power consumption of the circuit. Said circuit and method are designed in order to be implemented with a very economic number of components, capable to be realized with modern integrated circuit technologies.

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“High-Performance Crystal Oscillator Circuits: Theory and Application,” by Vittoz et al., IEEE Jrnl. of Solid-State Cir. vol. 23, No. 3, Jun. 1988, pp. 774-783.
“MOS Crystal Oscillator Design,” by Meyer et al., IEEE Jrnl. of Solid-State Circuit, vol. sc-15, No. 2, Apr. 1980, pp. 222-228.

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