Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Frequency or repetition rate conversion or control
Patent
1997-01-13
1999-07-27
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Frequency or repetition rate conversion or control
327113, 327 42, 327 48, H03B 1900
Patent
active
059296704
ABSTRACT:
A method for improving the precision of a signal generator utilizing counters. The difference between an external standard signal frequency and an internal standard frequency is measured by digital counters. The signal of this internal standard frequency signal source is counted by a first counter and the frequency of an external standard frequency signal source is counted by a second counter. A calculating and control part determines the accurate frequency of internal standard frequency signal source from count values of both counters. The measurement frequency signal source generates a signal with the desired frequency. The circuit is digitally implemented.
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Hewlett-Packard Service Manual, Model 4194A, Impedance/grain-Phase Analyzer, printed Jun., 1986, 3 pages.
Callahan Timothy P.
Giles April
Hewlett--Packard Company
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