Apparatus and method for power supply modulation
First Claim
1. An apparatus for amplifying a radio frequency transmission signal, the apparatus comprising:
- an envelope signal obtaining unit configured to obtain a slow envelope signal indicating a time averaging amplitude component of the radio frequency transmission signal and a fast envelope signal indicating an instant amplitude component of the radio frequency transmission signal;
a supply voltage modulating unit configured to provide an output modulated supply voltage to the power amplifying unit by modulating a direct current supply voltage based on both the synchronous slow envelope signal and the fast envelope signal,wherein the supply voltage modulating unit further comprises a slow modulator and a fast modulator synchronously,wherein the slow modulator is supplied with the direct current supply voltage and configured to provide a first intermediate supply voltage to the fast modulator by modulating the direct current supply voltage synchronously based on the slow envelope signal; and
a power amplifying unit configured to amplify power of the radio frequency transmission signal according to the output modulated supply voltage.
12 Assignments
0 Petitions
Accused Products
Abstract
Embodiments of the invention provide an apparatus for amplifying a radio frequency transmission signal, comprising: an envelope signal obtaining unit (210) configured to obtain a slow envelope signal indicating a time averaging amplitude component of the radio frequency signal and a fast envelope signal indicating an instant amplitude component of the radio frequency signal; a supply voltage modulating unit (230) configured to provide an output modulated supply voltage to the power amplifying unit by modulating a direct current supply voltage based on both the slow envelope signal and the fast envelope signal; and a power amplifying unit (220) configured to amplify power of the radio frequency transmission signal according to the output modulated supply voltage.
-
Citations
19 Claims
-
1. An apparatus for amplifying a radio frequency transmission signal, the apparatus comprising:
-
an envelope signal obtaining unit configured to obtain a slow envelope signal indicating a time averaging amplitude component of the radio frequency transmission signal and a fast envelope signal indicating an instant amplitude component of the radio frequency transmission signal; a supply voltage modulating unit configured to provide an output modulated supply voltage to the power amplifying unit by modulating a direct current supply voltage based on both the synchronous slow envelope signal and the fast envelope signal, wherein the supply voltage modulating unit further comprises a slow modulator and a fast modulator synchronously, wherein the slow modulator is supplied with the direct current supply voltage and configured to provide a first intermediate supply voltage to the fast modulator by modulating the direct current supply voltage synchronously based on the slow envelope signal; and a power amplifying unit configured to amplify power of the radio frequency transmission signal according to the output modulated supply voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A device for supply voltage modulating, the device comprising:
-
a first input port for receiving a slow envelope signal indicating a time averaging amplitude component of a radio frequency transmission signal; a second input port for receiving a fast envelope signal indicating an instant amplitude component of the radio frequency transmission signal; an output port for outputting an output modulated supply voltage; and a supply voltage modulating unit configured to provide the output modulated supply voltage by modulating a direct current supply voltage synchronously based on both the slow envelope signal and the fast envelope signal, wherein the supply voltage modulating unit further comprises a slow modulator and a fast modulator synchronously, wherein the slow modulator is supplied with the direct current supply voltage and configured to provide a first intermediate supply voltage to the fast modulator by modulating the direct current supply voltage synchronously based on the slow envelope signal. - View Dependent Claims (9, 10, 11, 12, 13)
-
-
14. A method for supply voltage modulating, comprising:
-
receiving a slow envelope signal indicating a time averaging amplitude component of the radio frequency signal and a fast envelope signal indicating an instant amplitude component of the radio frequency signal; and providing a first intermediate supply voltage by modulating the direct current supply voltage based on the slow envelope signal; providing an output modulated supply voltage by modulating a direct current supply voltage based on both the slow envelope signal and the fast envelope signal and by modulating the first intermediate supply voltage based on the fast envelope signal synchronously. - View Dependent Claims (15, 16, 17, 18, 19)
-
Specification