Modulators – Frequency shift keying modulator or minimum shift keying...
Patent
1997-12-10
2000-12-19
Grimm, Siegfried H.
Modulators
Frequency shift keying modulator or minimum shift keying...
331 40, 331 41, 332101, 375272, 375306, 375307, H03B 2101, H03C 300, H04L 2712
Patent
active
061632295
ABSTRACT:
A frequency generating circuit scales a warp range of a frequency signal. The frequency generating circuit includes a first frequency signal (10) having a first offset signal with a first frequency relationship to the first frequency signal, and a second frequency signal (14). A frequency scaling element (16) receives the first frequency signal (10) and second frequency signal and provides a third frequency signal, such that the third frequency signal includes the first offset signal having a second frequency relationship to the third signal. A switch (54), has a control input (74), a first input for receiving the first frequency signal, a second input operably coupled to the frequency scaling element (16, 42) for receiving the third frequency signal and an output (76) operably coupled to the first input or the second input dependent upon a control signal applied to the control input (74).
REFERENCES:
patent: 4258436 (1981-03-01), Campbell
patent: 5309479 (1994-05-01), Cheah
patent: 5329258 (1994-07-01), Matsuura
patent: 5446421 (1995-08-01), Kechkaylo
Caspers Alfred
Lichterfeld Stefan
Mueller Manfred
Roettger Norbert
Grimm Siegfried H.
Motorola Inc.
Scutch, III Frank M.
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