초록 ▼

A circuit for generating an output voltage which is used during active time periods and not during inactive time periods. A DC/DC converter converts an input voltage to the output voltage. During the inactive time periods, a capacitor is charged with a quantity of charge which is then used to genera

A circuit for generating an output voltage which is used during active time periods and not during inactive time periods. A DC/DC converter converts an input voltage to the output voltage. During the inactive time periods, a capacitor is charged with a quantity of charge which is then used to generate the output voltage during the active time periods. The quantity of charge is generated by a current from a current generator. The current is lead to the ground via the capacitor and a diode. As the capacitor is charged more and more, the current diminishes to zero. A control voltage switches the circuit during the active time periods so that the output voltage is obtained. The circuit can be used in a radio transmitter for portable radio equipment, in which the radio equipment is used in a radio system where transmissions occur in bursts.

대표청구항 ▼

[ What is claimed is:] [1.] Circuit for the generation of an output voltage for use during active time periods but not during inactive time periods, the circuit comprising:means for connecting a control voltage to the circuit, for switching between the active and the inactive time periods,means for

[ What is claimed is:] [1.] Circuit for the generation of an output voltage for use during active time periods but not during inactive time periods, the circuit comprising:means for connecting a control voltage to the circuit, for switching between the active and the inactive time periods,means for connecting an input voltage to the circuit,a DC/DC-converter for converting the input voltage into the output voltage including a diode and a first transistor and storage means, wherein said storage means comprises a first condenser and is charged with a quantity of charge during the inactive time periods, for generating the output voltage during the active time periods,a current generator for generating a current, for generating the quantity of charge which charges said storage means, said current generator comprising a first resistor,wherein said current generator is connected in series with a parallel connection comprising a first branch which comprises the storage means in series with said diode and a second branch which includes said first transistor,wherein said storage means and said diode are connected in parallel with said first transistor.