Tracker circuit and radio frequency circuit
AssigneeMurata Manufacturing Co., Ltd.
InventorsMuneharu KATO, Kouji YAMAGUCHI, Seiko NETSU, Atsushi HIRONO
Life of this patent
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Abstract
A tracker circuit is provided that includes multiple control input terminals configured to receive respective multiple DCL signals, a switched-capacitor circuit configured to generate multiple discrete voltages from an input voltage, a supply modulator configured to selectively output at least one of the multiple discrete voltages to a power amplifier based on the multiple DCL signals with a first delay, a supply modulator configured to selectively output at least one of the multiple discrete voltages to a power amplifier based on the multiple DCL signals, and a delay circuit configured to generate the first delay.
Claims20
A tracker circuit, comprising:
- a plurality of external connection terminals configured to receive a plurality of digital control level signals, each of the plurality of external connection terminals receiving a respective digital control level signal of the plurality of digital control level signals;
- a switched-capacitor circuit configured to generate a plurality of discrete voltages from an input voltage, the switched-capacitor circuit comprising at least a switch;
- a first supply modulator configured to selectively output at least one of the plurality of discrete voltages as a first power supply to a first power amplifier based on the plurality of digital control level signals with a first delay;
- a second supply modulator configured to selectively output at least one of the plurality of discrete voltages as a second power supply to a second power amplifier based on the plurality of digital control level signals;
- and
- a first delay circuit configured to generate the first delay.
A radio-frequency circuit, comprising:
- a plurality of first external connection terminals configured to receive a plurality of discrete voltages, each of the plurality of first external connection terminals receiving a respective discrete voltage of the plurality of discrete voltages;
- a plurality of second external connection terminals configured to receive a plurality of digital control level signals, each of the plurality of second external connection terminals receiving a respective digital control level signal of the plurality of digital control level signals;
- a first power amplifier and a second power amplifier;
- a first supply modulator configured to selectively output at least one of the plurality of discrete voltages as a first power supply to the first power amplifier based on the plurality of digital control level signals with a first delay;
- a second supply modulator configured to selectively output at least one of the plurality of discrete voltages as a second power supply to the second power amplifier based on the plurality of digital control level signals;
- and
- a first delay circuit configured to generate the first delay.
Dependencies are inferred from the claim text.