Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Frequency or repetition rate conversion or control
Patent
1996-07-18
1998-06-16
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Frequency or repetition rate conversion or control
327231, 327248, 327114, G11B 504, H04N 9497
Patent
active
057677050
ABSTRACT:
A frequency converting circuit has a phase divider, a switching circuit, and switching pulse generator. The phase divider divides a phase of a first input signal and outputting m-units of channel signals having a same frequency but different phases shifted 2.pi./m by 2.pi./m radian respectively, where m is a three or more natural number except 2.sup.n (n: a natural number). The m-units of the channel signals are switched by the switching circuit to output switched channel signals. In response to a second input signal having a frequency higher than that of the first input signal, the switching pulse generator generates switching pulse signals, and switches and outputs the m-units of channel signals having different phases shifted 2.pi./m by 2.pi./m radian for each constant period, by controlling the switching circuit based on the switching pulse signals. The switched channel signals are synthesized to output a signal having a frequency difference between the first input signal and the switching pulse signals or a frequency addition of the first input signal and the switching pulse signals.
REFERENCES:
patent: 3912916 (1975-10-01), Grun et al.
patent: 4868428 (1989-09-01), Cooper
"Digital Analog Communication System (First Volume)" by B. P. Russi, pp. 226-251, published by CBS Corp., Mar. 28, 1995.
Ichinoi Yutaka
Ishigaki Yukinobu
Callahan Timothy P.
Le Dinh
Victor Company of Japan Ltd.
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