US 2023/0124941 A1 · MULTI-VOLTAGE GENERATION CIRCUIT

Abstract

A multi-voltage power generation circuit is disclosed. More specifically, the multi-voltage generation circuit includes multiple voltage modulation circuits that are configured to generate and maintain multiple modulated voltages. In a non-limiting example, the multiple modulated voltages can be used for amplifying multiple radio frequency (RF) signals concurrently. Contrary to using multiple direct-current (DC) to DC (DC-DC) converters for generating the multiple modulated voltages, the voltage modulation circuits are configured to share a single current modulation circuit based on time-division. By sharing a single current modulation circuit among the multiple voltage modulation circuits, it is possible to concurrently support multiple load circuits (e.g., power amplifier circuits) with significantly reduced footprint.

Claims20

Dependent claims

A multi-voltage generation circuit comprising:

a current modulation circuit configured to generate a plurality of low-frequency currents;
a plurality of voltage modulation circuits each comprising:
a respective one of a plurality of voltage amplifiers configured to generate a respective one of a plurality of modulated initial voltages based on a respective one of a plurality of modulated target voltages;
and
a respective one of a plurality of offset capacitors each modulated to a respective one of a plurality of offset voltages by a respective one of the plurality of low-frequency currents such that the respective one of the plurality of offset voltages can raise the respective one of the plurality of modulated initial voltages to thereby generate a respective one of a plurality of modulated voltages;
and
a control circuit configured to:
determine an order for generating the plurality of low-frequency currents in one or more operation periods;
and
cause the current modulation circuit to generate the plurality of low-frequency currents in each of the one or more operation periods according to the determined order.

7 more elements

A multi-voltage power management circuit comprising:

a plurality of power amplifier circuits configured to concurrently amplify a plurality of radio frequency (RF) signals based on a plurality of modulated voltages, respectively;
and
a multi-voltage generation circuit comprising:
a current modulation circuit configured to generate a plurality of low-frequency currents;
a plurality of voltage modulation circuits each comprising:
a respective one of a plurality of voltage amplifiers configured to generate a respective one of a plurality of modulated initial voltages based on a respective one of a plurality of modulated target voltages;
and
a respective one of a plurality of offset capacitors each modulated to a respective one of a plurality of offset voltages by a respective one of the plurality of low-frequency currents such that the respective one of the plurality of offset voltages can raise the respective one of the plurality of modulated initial voltages to thereby generate a respective one of the plurality of modulated voltages;
and
a control circuit configured to:
determine an order for generating the plurality of low-frequency currents in one or more operation periods;
and
cause the current modulation circuit to generate the plurality of low-frequency currents in each of the one or more operation periods according to the determined order.

10 more elements

Dependencies are inferred from the claim text.

Multi-voltage generation circuit

Life of this patent

Multi-voltage generation circuit

Life of this patent

Abstract

Claims20