Power supply circuit for transmitter
AssigneeSharp Kabushiki Kaisha
InventorHitoshi Nitta
Life of this patent
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Abstract
A DC voltage input to an IF, DC input is applied to a switching regulator of a power supply circuit, a DC voltage necessary for driving a power amplifier is directly applied from the switching regulator to the power amplifier, the voltage from the switching regulator circuit is applied to a voltage converter circuit from which a negative voltage of 5V is generated and applied to the power amplifier and other circuit, a positive voltage of 5V is generated from a dropper regulator circuit and applied to the power amplifier and other circuits.
Claims11
A power supply circuit for a low power consumption transmitter that converts an intermediate frequency signal superposed on an input DC voltage to a microwave signal for output, said power supply circuit comprising:
- a switching regulator circuit converting said input DC voltage with said intermediate frequency signal superimposed thereon to a prescribed DC voltage;
- and
- a power amplifier amplifying said microwave signal;
- wherein
- the DC voltage as an output of said switching regulator circuit is supplied directly to said power amplifier without any intervening regulator.
A power supply circuit for a low power consumption transmitter that converts an intermediate frequency signal superposed on an input DC voltage to a microwave signal for output, said power supply circuit comprising:
- a switching regulator circuit converting said input DC voltage with said intermediate frequency signal superimposed thereon to a prescribed DC voltage;
- a separating unit for separating the DC voltage from the intermediate frequency signal;
- and
- a power amplifier amplifying said microwave signal;
- wherein
- the DC voltage as an output of said switching regular circuit is supplied directly to said power amplifier without any intervening regulator.
A power supply circuit for a low power consumption transmitter that converts an intermediate frequency signal superposed on an input DC voltage to a microwave signal for output, said power supply circuit comprising:
- a switching regulator circuit converting said input DC voltage with said intermediate frequency signal superimposed thereon to a prescribed DC voltage;
- a coil for separating the DC voltage from the intermediate frequency signal;
- and
- a power amplifier amplifying said microwave signal;
- wherein
- the DC voltage as an output of said switching regulator circuit is supplied directly to said power amplifier without any intervening regulator.
Dependencies are inferred from the claim text.