Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Frequency or repetition rate conversion or control
Reexamination Certificate
2006-08-15
2006-08-15
Le, Dinh T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Frequency or repetition rate conversion or control
C327S119000, C327S113000
Reexamination Certificate
active
07091757
ABSTRACT:
The object of the invention is to provide a frequency generator which is composed of an oscillator and a frequency doubler and in which difference in amplitude between differential outputs of the frequency doubler can be equalized at low power consumption without adjustment. To achieve the object, the amplitude of differential outputs of the frequency doubler is detected and the delay time of a variable delay circuit is controlled. Owing to this configuration, in case a frequency of the oscillator varies or in case delay time by the delay circuit used in the frequency doubler varies by process variation and others even if the frequency is fixed, the amplitude of the differential outputs of the frequency doubler can be also equalized in the frequency generator.
REFERENCES:
patent: 5011561 (1991-04-01), Carolus et al.
patent: 5297179 (1994-03-01), Tatsumi
patent: 5389886 (1995-02-01), Popescu
patent: 6229359 (2001-05-01), Chesavage
patent: 4-329710 (1992-11-01), None
patent: 7-115325 (1995-05-01), None
patent: 2000-68744 (2000-03-01), None
Le Dinh T.
Miles & Stockbridge P.C.
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