Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By frequency
Reexamination Certificate
2006-08-22
2006-08-22
Callahan, Timothy P. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By frequency
C327S048000, C327S151000
Reexamination Certificate
active
07095254
ABSTRACT:
A method which provides a very simple way of forming a control signal if the frequencies differ too greatly from one another between a useful signal and a reference signal. A control signal is produced which indicates that the frequency error between the frequencies of a useful signal and the frequency of a reference signal exceeds a prescribed error limit value, where the useful signal and the reference signal are used to produce a pulsed signal whose pulse length is proportional to the frequency difference between the useful signal and the reference signal. The pulse length is then compared with a prescribed maximum pulse length, and the control signal is produced if the pulse length exceeds the prescribed maximum pulse length.
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Eschweiler & Associates LLC
Infineon Techologies AG
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