发明名称 |
Constant resolution frequency synthesizer |
摘要 |
A frequency synthesizer which has a constant resolution over an octave frequency range is disclosed. The frequency synthesizer has a presettable high speed counter, a low speed counter, an adjusting counter, and a count selector. The low speed counter provides a first output signal whose frequency is rapidly alternated between two closely-spaced frequencies so that the average frequency of the output signal is the desired frequency. The adjusting counter determines the period of time that each of the closely-spaced frequencies is present at the output. The count selector determines the frequency of each of the two closely-spaced frequencies. The frequency synthesizer also has a phase splitter and provides a second output signal which is also of the desired frequency but which is phase-shifted by ninety degrees from the first output signal.
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申请公布号 |
US4633183(A) |
申请公布日期 |
1986.12.30 |
申请号 |
US19850706663 |
申请日期 |
1985.02.28 |
申请人 |
HAYES MICROCOMPUTER PRODUCTS, INC. |
发明人 |
HEATHERINGTON, DALE A. |
分类号 |
H03L7/197;(IPC1-7):H03L7/18 |
主分类号 |
H03L7/197 |
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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