发明名称 |
Frequency control apparatus and method, and storage medium storing a program for carrying out the method |
摘要 |
A frequency control apparatus controls the frequency of an output signal thereof in synchronism with an externally input timing signal. A variable frequency oscillator generates the output signal such that the output signal has a frequency thereof variable in response to a control signal input to the variable frequency oscillator. An input device receives the timing signal. A checking device checks a monitor amount variable in response to the frequency of the output signal from the variable frequency oscillator, in timing in which the timing signal is input. A calculating device calculates a difference between the checked monitor amount and a predetermined desired amount. A control device controls the control signal input to the variable frequency oscillator such that the calculated difference becomes zero.
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申请公布号 |
US6396891(B1) |
申请公布日期 |
2002.05.28 |
申请号 |
US19990452443 |
申请日期 |
1999.12.02 |
申请人 |
YAMAHA CORPORATION |
发明人 |
MASAFUMI TOSHITANI;KINYA INOUE;HIROMI IMURA;HITOSHI KOSEKI;SADAYUKI NARUSAWA;SHUICHI ESAKI |
分类号 |
H03L7/085;H03L7/089;H03L7/181;(IPC1-7):H03L7/00 |
主分类号 |
H03L7/085 |
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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