Title:
圧電結晶発振回路を備えた受信機
Document Type and Number:
Japanese Patent JP3974679
Kind Code:
B2
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.
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Inventors:
Knudu Holt Foes
Andreas Wicheln
Villefried Acnopp
Andreas Wicheln
Villefried Acnopp
Application Number:
JP6262997A
Publication Date:
September 12, 2007
Filing Date:
March 17, 1997
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
H04B1/26; H03J7/12; H03L1/02; H04B1/16; H03D7/16
Domestic Patent References:
| JP7038429A | ||||
| JP5063130U | ||||
| JP61114612A |
Attorney, Agent or Firm:
Kenji Sugimura
Eiji Fujiwara
Kosaku Sugimura
Norita Tomita
Umemoto Masao
Eiji Fujiwara
Kosaku Sugimura
Norita Tomita
Umemoto Masao