Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Patent
1997-03-05
2000-06-13
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
455318, H04B 106
Patent
active
060759798
ABSTRACT:
A receiver has a crystal oscillator (10) whose frequency can be adjusted in response to temperature compensation (TC) and automatic frequency control (afc) signals. The TC and afc signals are summed and applied to an op-amp (70) having a fixed gain functioning as a current to voltage converter. An output of the op-amp (70) is applied to the crystal oscillator (10). If the receiver is switched--on and--off in accordance with say a time division protocol, the output of the op-amp (70) is applied by way of a switch (72) to a storage circuit (30,C) which when the switch is open applies a bias voltage on the crystal oscillator (10) to maintain its output frequency.
REFERENCES:
patent: 4893097 (1990-01-01), Zwack
patent: 5335364 (1994-08-01), Heinonen
patent: 5649320 (1997-07-01), Korhonen et al.
patent: 5691666 (1997-11-01), Owen
patent: 5731742 (1998-03-01), Wojewoda et al.
patent: 5740525 (1998-04-01), Spears
patent: 5774800 (1998-06-01), Mori
Holtvoeth Knud
Knop Wilfried
Wichern Andreas
Banks-Harold Marsha D.
Eisenzopf Reinhard J.
Slobod Jack D.
U.S. Philips Corporation
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