H - Electricity – 04 – J
Patent
H - Electricity
04
J
363/17
H04J 3/10 (2006.01) H03D 1/10 (2006.01) H03G 3/20 (2006.01) H04B 7/185 (2006.01)
Patent
CA 1246253
ABSTRACT A burst signal generating apparatus includes a modulator circuit for modulating a carrier wave of an intermediate frequency with a modulating signal. It also includes a frequency converter circuit for converting the output frequency of the modulator circuit into a radio frequency. An amplitude control unit responsive to a burst control signal controls the amplitude of the carrier wave of the radio frequency. A switching circuit responsive to the burst control signal causes switching of the carrier wave of the inter- mediate frequency. The invention permits ready suppression of the carrier wave during the pauses of burst signals. A reduced number of PIN diodes can be used in the high frequency region. The invention also permits the use of a class C amplifier, which is highly efficient, yet has a wide dynamic range and is virtually free of carrier wave leaks. The apparatus of the invention consumes little power and is compact.
477795
Corporation Nec
Smart & Biggar
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