Document Type and Number:
Japanese Patent JPH0363262
Kind Code:
B2
Abstract:
The phase modulator apparatus for generating a burst phase-modulated wave comprises a carrier generator (1) for generating a carrier wave, a phase modulator (3) for phase-modulating the carrier wave with an input information signal, an amplifier (4) for amplifying the output of the phase modulator (3),and a power source (8) for commonly supplying a source voltage to the carrier generator (1), the phase modulator (3) and the amplifier (4). A first switch (5) is responsive to a burst control signal for controlling the supply of the source voltage to the amplifier (4), a load is coupled to the power source (8), and a second switch (6), connected to the load (7) in series, is responsive to the burst control signal for operating in a manner mutually complementary to the first switch (5). This phase modulator apparatus eliminates frequency variations of the oscillator caused by fluctuations in power source voltage during burst mode operation.
Inventors:
OOMAGARI SHINICHI
Application Number:
JP12228786A
Publication Date:
September 30, 1991
Filing Date:
May 29, 1986
Export Citation:
Assignee:
NIPPON ELECTRIC CO
International Classes:
H03L1/00; H04J3/10; H04L27/20