Receiver with a crystal oscillator having a...

Details Receiver with a crystal oscillator having a... Receiver with a crystal oscillator having a...

2007-05-01

2007-05-01

Nguyen, Duc M. (Department: 2617)

Telecommunications

Receiver or analog modulated signal frequency converter

Convertible to different type

C455S255000

Reexamination Certificate

active

10482011

ABSTRACT:
A receiver in which the sneaking noise from a crystal oscillator is reduced. A high-frequency amplifier circuit11, a mixing circuit12, a local oscillator13, intermediate-frequency filters14and16, an intermediate-frequency amplifier circuit15, a limit circuit17, an FM detection circuit18, and a stereo demodulation circuit19, an oscillator20, and a PLL circuit21all constituting an FM receiver are provided as a one-chip component10. A crystal oscillator31as an external component is connected to the oscillator20. The natural-oscillation frequency of the crystal oscillator31is so set that the fundamental component and its harmonics are out of the reception band.

REFERENCES:
patent: 2001/0031629 (2001-10-01), Elder et al.
patent: 2000-068872 (2000-03-01), None
patent: 2000-082779 (2000-03-01), None
patent: 2002-171181 (2002-06-01), None

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