Receiver, digital-analog converter and tuning circuit

Details Receiver, digital-analog converter and tuning circuit Receiver, digital-analog converter and tuning circuit

2008-07-22

2008-07-22

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Converter compensation

Temperature compensation

C341S155000

Reexamination Certificate

active

07403140

ABSTRACT:
An object of the present invention is to provide a receiver, a digital-analog converter and a tuning circuit in which temperature compensating components can be formed on a semiconductor substrate while reducing component costs. An FM receiver100is constituted by including an antenna1, a high frequency receiving circuit2, a local oscillator3, two digital-analog converters (DACs)4, 6, a control section8, a mixing circuit9, an intermediate frequency amplification circuit10, a detection circuit11, a low frequency amplification circuit12and the speaker13. The DACs4, 6have a predetermined temperature coefficient, of which output voltage is changed in accordance with ambient temperature. When a characteristic of VCO31is changed with variations of ambient temperature so as to cause a control voltage applied to the VCO31to be changed, output voltages of the DACs4, 6are also changed similarly.

REFERENCES:
patent: 4220922 (1980-09-01), Ikeguchi
patent: 4837852 (1989-06-01), Takada et al.
patent: 5428829 (1995-06-01), Osburn et al.
patent: 5781851 (1998-07-01), Saito
patent: 6188970 (2001-02-01), Becker et al.
patent: 6243570 (2001-06-01), Kobayashi
patent: 6704555 (2004-03-01), Sih et al.
patent: 7120407 (2006-10-01), Miyagi
patent: 2007/0005289 (2007-01-01), Huang
patent: 61-118026 (1986-06-01), None
patent: 4-358422 (1992-12-01), None
patent: 09-069757 (1997-03-01), None
patent: 2002-319846 (2002-10-01), None
patent: 2002/111527 (2004-04-01), None

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