Title:
FM MODULATOR
Document Type and Number:
WIPO Patent Application WO/1997/018625
Kind Code:
A1
Abstract:
An FM modulator (1) includes two phase shifting circuits (10C and 130C) and an FET (35) is provided in a CR circuit in the circuit (130C). The FM modulator (1) oscillates at the frequency at which the sum of the amounts of phase shift by means of the two circuits (10C and 130C) is 360�. When the channel resistance of the FET (35) is slightly changed by a signal inputted externally, the modulator (1) outputs FM signals from an output terminal (92) by directly utilizing the change for the frequency modulation.
Inventors:
IKEDA TAKESHI (JP)
OKAMOTO AKIRA (JP)
OKAMOTO AKIRA (JP)
Application Number:
PCT/JP1996/001706
Publication Date:
May 22, 1997
Filing Date:
June 20, 1996
Export Citation:
Assignee:
IKEDA TAKESHI (JP)
OKAMOTO AKIRA (JP)
OKAMOTO AKIRA (JP)
International Classes:
H03C3/10; (IPC1-7): H03C3/08; H03C3/20
Foreign References:
| JPS5947483B2 | 1984-11-19 | |||
| JPS5331947A | 1978-03-25 | |||
| JPH0575387A | 1993-03-26 | |||
| JPS5427306A | 1979-03-01 | |||
| JPS52120657A | 1977-10-11 | |||
| JPS334384B1 | ||||
| JPS5029024A | 1975-03-24 | |||
| JPS54959A | 1979-01-06 | |||
| JPH05183406A | 1993-07-23 |
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