Receiving apparatus for digital broadcasting

Details Receiving apparatus for digital broadcasting Receiving apparatus for digital broadcasting

1998-08-04

2000-09-05

Isen, Forester W.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

455132, 375332, 375347, H04H 500

Patent

active

061154733

ABSTRACT:
A receiving apparatus for receiving digital broadcasting of a first frequency band and frequency band has a local oscillation circuit for generating a first local oscillation signal, and a frequency conversion circuit for frequency-converting the first local oscillation signal to generate a second local oscillation signal. The received signal of the first frequency band is up-converted to a first intermediate frequency signal using one of the of first and second local oscillation signals, and the received signal of the frequency band is down-converted to the first intermediate frequency signal using the other of the first and second local oscillation signals. Further, the receiving apparatus has another local oscillation circuit for oscillating a local oscillation frequency used for frequency conversion of the first intermediate frequency signal to a second intermediate frequency signal, an A/D converter for A/D converting the second intermediate frequency signal, and an orthogonal demodulation circuit for extracting I-component data and Q-component data from the A/D converted signal and for digital-converting the data.

REFERENCES:
patent: 5003557 (1991-03-01), Fujiyama
patent: 5584051 (1996-12-01), Goken
patent: 5761190 (1998-06-01), Yamauchi et al.
patent: 5761252 (1998-06-01), Iinuma
patent: 5838799 (1998-11-01), Cioffi et al.
patent: 5852784 (1998-12-01), Ito et al.
patent: 5862226 (1999-01-01), Cervini
patent: 5878089 (1999-03-01), Dapper et al.
patent: 5946292 (1999-08-01), Tsujishita et al.

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