发明名称 |
Temperature-compensated crystal oscillator |
摘要 |
A temperature-compensated crystal oscillator with good phase noise characteristics has a crystal unit, a voltage-variable capacitive element inserted in a closed oscillating loop including the crystal unit, and an amplifier for keeping oscillation in the closed oscillating loop. The frequency vs. temperature characteristics of the temperature-compensated crystal oscillator can be compensated for by the temperature compensating voltage input thereto. The temperature compensating voltage is applied to an anode of the voltage-variable capacitive element, and a voltage to prevent a current from flowing through the voltage-variable capacitive element is applied to a cathode of the voltage-variable capacitive element. The voltage-variable capacitive element preferably comprises a variable-capacitance diode.
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申请公布号 |
US6737928(B2) |
申请公布日期 |
2004.05.18 |
申请号 |
US20020205999 |
申请日期 |
2002.07.26 |
申请人 |
NIHON DEMPA KOGYO CO., LTD. |
发明人 |
KUBO KUICHI;ASAMURA FUMIO |
分类号 |
H03B5/32;H03L1/02;(IPC1-7):H03B5/32 |
主分类号 |
H03B5/32 |
代理机构 |
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代理人 |
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主权项 |
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