Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Patent
1997-09-24
1999-12-14
Bost, Dwayne D.
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
455311, 455315, 455259, H04B 126
Patent
active
060029269
ABSTRACT:
A double superheterodyne type receiving circuit having a first local oscillating circuit for converting a received signal into a first intermediate frequency signal and a second local oscillating circuit for converting the first intermediate frequency signal into a second intermediate frequency signal, comprising an oscillator 16 composing the first local oscillating circuit, a first variable frequency divider 17 composing the second oscillating circuit for dividing the frequency of an output signal of the first oscillator, a second variable frequency divider 18 for dividing the frequency of an output signal of the first variable frequency divider, a variable frequency dividing controlling circuit 23 for controlling frequency dividing values of the first and second variable frequency dividers on the base of an exponential function relation, at least one fixed frequency divider 19 for dividing the frequency of an output signal of the second variable frequency divider 18, a reference oscillator 20 for outputting a signal with a predetermined frequency, and a phase comparator 22 for comparing an output signal of the fixed frequency divider 19 and an output signal of the reference oscillator 20 and controlling an oscillation frequency of the oscillator.
REFERENCES:
patent: 5204983 (1993-04-01), Jones
patent: 5230095 (1993-07-01), Onodera et al.
patent: 5388125 (1995-02-01), Toda et al.
patent: 5390346 (1995-02-01), Marz
patent: 5497509 (1996-03-01), Lautzenhiser
patent: 5499393 (1996-03-01), Fukui
patent: 5603099 (1997-02-01), Watanabe
patent: 5606736 (1997-02-01), Hasler et al.
patent: 5710997 (1998-01-01), Okanobu
patent: 5832375 (1996-11-01), Leisten et al.
NEC Corporation, Bipolar Digital Integrated Circuit .mu.PB10001GR, Sep. 1993.
Dr. M. Hagiwara, et al., Utility PLL Frequency Synthesizer, Fig. 6.22.
SONY Corporation, Sony Semiconductor Home Page, New Technology, 1995-1997.
Bost Dwayne D.
NEC Corporation
Vuong Quochien B.
LandOfFree
Double superheterodyne type receiving circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Double superheterodyne type receiving circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Double superheterodyne type receiving circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-872651