发明名称 |
Voltage-controlled oscillator, IC chip for voltage-controlled oscillator, resistance setting apparatus, and resistance setting method |
摘要 |
<p>The invention aim at improving the linearity of frequency versus control voltage characteristic and to increase the range of frequency that can be varied by a control voltage. A resistor circuit (20) is connected between a piezoelectric resonator (X) and an oscillator circuit (100). The resistor circuit (20) includes a plurality of resistors (Rs1 to Rsn) and corresponding switches (SW1 to SWn). The resistor circuit (20) adjusts the amplitude of oscillation. When a control voltage (Vc) applied to a varactor (Cv) is at a low level, clipping by a forward voltage of the varactor (Cv) is suppressed, and the frequency is linearly changed by the control voltage Vc within a range of a low level to a high level. <IMAGE></p> |
申请公布号 |
EP1187309(A2) |
申请公布日期 |
2002.03.13 |
申请号 |
EP20010119839 |
申请日期 |
2001.08.16 |
申请人 |
SEIKO EPSON CORPORATION |
发明人 |
FUJII, YOICHI;KINOSHITA, HIROSHI;ENDO, TAKASHI |
分类号 |
H03B5/32;H03B5/12;H03B5/36;(IPC1-7):H03B5/36 |
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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地址 |
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