发明名称 |
Improvements in or relating to radio receivers |
摘要 |
<p>A receiver has a crystal oscillator (10) whose frequency can be adjusted in response 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. <IMAGE></p> |
申请公布号 |
EP0797304(A2) |
申请公布日期 |
1997.09.24 |
申请号 |
EP19970200728 |
申请日期 |
1997.03.11 |
申请人 |
PHILIPS CORPORATE INTELLECTUAL PROPERTY GMBH;KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
HOLTVOETH, KNUD;WICHERN, ANDREAS;KNOP, WILFRIED |
分类号 |
H03D7/16;H03J7/12;H03L1/02;H04B1/16;(IPC1-7):H03L1/00 |
主分类号 |
H03D7/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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