The design of high quality reference oscillator for DDS

The design of high quality reference oscillator for DDS

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Direct digital synthesis is used in many applications. There is necessary to use a quality source of the clock signal. One of the best circuits for this purpose is Butler oscillator as emitter follower. By this circuit is possible to design a high frequency oscillator working up to hundred megahertz. In this paper the design of the Butler oscillator by use of a feedback loop analysis in resonance frequency vicinity of the crystal is showed. For non-linear analysis of the oscillator, the harmonic balance method is used.

Direct digital synthesis is used in many applications. There is necessary to use a quality source of the clock signal. One of the best circuits for this purpose is Butler oscillator as emitter follower. By this circuit is possible to design a high frequency oscillator working up to hundred megahertz. In this paper the design of the Butler oscillator by use of a feedback loop analysis in resonance frequency vicinity of the crystal is showed. For non-linear analysis of the oscillator, the harmonic balance method is used.

Butler oscillator, reference oscillator DDS, piezoelectric crystal unit

Butler oscillator, reference oscillator DDS, piezoelectric crystal unit

ROUBAL, Z.; ČÁP, M.

2012

06.09.2011

Plzeň

978-80-7043-993-7

AMTEE 11 proceedings

III-17

III-18

2