Piezoelectric oscillator having reduced radiation of higher harm

Details Piezoelectric oscillator having reduced radiation of higher harm Piezoelectric oscillator having reduced radiation of higher harm

1992-04-16

1994-04-12

Grimm, Siegfried H.

Oscillators

With electromagnetic or electrostatic shield

331 68, 331 77, 331105, 331116R, 331158, 331186, H03B 536, H03B 104, H03L 500

Patent

active

053029216

ABSTRACT:
A piezoelectric oscillator in which radiation of higher harmonic components is reduced. A piezoelectric vibrator and a semiconductor device are provided in an oscillation circuit for making the piezoelectric vibrator oscillate, as is a filter for cutting components in a predetermined frequency band or higher harmonic components of an oscillation signal outputted from the semiconductor device. The piezoelectric vibrator, the semiconductor device and the filter are packed in one package. Radiation of the higher harmonic components is reduced by placing the filter close to the oscillator, by providing a shielding or by operating portions of the oscillator output circuit with a reduced supply voltage.

REFERENCES:
patent: 3863175 (1975-01-01), Kent
patent: 4328572 (1982-05-01), Kawahara
patent: 4338576 (1982-07-01), Takahashi et al.
patent: 4916413 (1990-04-01), Nakayama et al.

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