Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and apparatus for improving efficiency of class E power amplifier

A power amplifier, efficiency technology, applied in the direction of power amplifier, improving amplifier to improve efficiency, etc., to achieve the effect of improving efficiency

Active Publication Date: 2011-05-04
HUAWEI TECH CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]However, in practical applications, due to various factors, the actual working efficiency of Class E power amplifiers is reduced, and can only reach a level of about 70% or even lower

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and apparatus for improving efficiency of class E power amplifier
  • Method and apparatus for improving efficiency of class E power amplifier
  • Method and apparatus for improving efficiency of class E power amplifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] see image 3 as shown, Capacitors in parallel with the transistor collectors of class power amplifiers is the capacitance in series with the transistor collector of the power amplifier, L 1 is the inductor in series with the transistor collector of the power amplifier. Among them, C 1 with C 2 It can be an adjustable capacitive reactance device. L 1 and C 2 Form a series resonant circuit. L RFC It is a choke coil, one end is connected to the power supply, and the other end is connected to the collector of the transistor. Its function is to pass through the DC signal to block the AC signal. The input terminal I of the E-class power amplifier circuit can be connected to the signal source. The E-class power The output terminal O of the amplifying circuit can be connected with an external load.

[0039] The parallel capacitive reactance of the class E power amplifier can be an adjustable parallel capacitor C 1 The value of the series capacitive reactance can be...

Embodiment 2

[0049] see Figure 4 as shown, Figure 4 Middle C 1 is the capacitor connected in parallel with the transistor collector of the class E power amplifier, C 2 is the capacitance in series with the transistor collector of the power amplifier, L 1 is the inductor in series with the transistor collector of the power amplifier. Among them, C 1 is an adjustable capacitive reactance device, L 1 It is an adjustable inductive reactance device. L 1 and C 2 Form a series resonant circuit. L RFC It is a choke coil, one end is connected to the power supply, and the other end is connected to the collector of the transistor. Its function is to pass through DC and block AC. The input terminal I of the class E power amplifier can be connected to a signal source, and the output terminal O of the class E power amplifier can be connected to a load.

[0050] Figure 4 Among them, the power input end of the class E amplifier is also connected with a power input power measurement circuit,...

Embodiment 3

[0055] see Figure 5 as shown, Figure 5 Middle C 1 It is an adjustable capacitor connected in parallel with the transistor collector of the class E power amplifier, C 2 is an adjustable capacitor connected in series with the transistor collector of the power amplifier, L 1 It is an adjustable inductance connected in series with the transistor collector of the power amplifier. L 1 and C 2 Form a series resonant circuit. L RFC It is a choke coil, one end is connected to the power supply, and the other end is connected to the collector of the transistor. Its function is to pass through DC and block AC. The input terminal I of the class E power amplifier can be connected to a signal source, and the output terminal O of the class E power amplifier can be connected to a load.

[0056] Figure 5 Among them, the power input end of the class E amplifier is also connected with a power input power measurement circuit, and the output end of the class E amplifier circuit is also co...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The embodiment of the invention discloses a method and a device for improving the efficiency of E class power amplifiers. The method includes: A. the efficiency of a power amplifier before and after regulating parallel capacitive reactance are respectively obtained; B. according to the regulated efficiency of the power amplifier before and after regulating parallel capacitive reactance, the parallel capacitive reactance is adjusted; the steps A and B are repeated until the efficiency of the power amplifier does not increase and series connection capacitive reactance and / or series connection inductance are adjusted; C. the efficiency of the power amplifier before and after regulating the series connection capacitive reactance and / or inductance are respectively adjusted; D. the series connection capacitive reactance and / or inductance are adjusted according to the efficiency gained in the step C; the steps C and D are repeated until the efficiency of the power amplifier does not improve.The embodiment of the invention adjusts the parallel capacitive reactance as well as the series connection capacitive reactance and / or inductance by monitoring the efficiency of the power amplifier before and after the adjustment until the efficiency does not improve any more, thus improving the efficiency of the E class power amplifiers.

Description

technical field [0001] The invention relates to the field of electronic communication, in particular to a method and device for improving the efficiency of a class E power amplifier. Background technique [0002] With the continuous development of the wireless communication industry, people place higher expectations on wireless communication technology and put forward higher requirements. Continuously improving the efficiency of transceivers in wireless communication systems and reducing their power consumption has become a major research direction of wireless communication technology. The last stage of the wireless transceiver, the power amplifier, accounts for more than 60% of the power consumption of the entire system. If the efficiency of the high power amplifier can be effectively improved, the performance of the entire system must be greatly improved. In 1975, Sokal proposed the class E power amplifier model, which can theoretically achieve 100% working efficiency, a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/02H03F3/20
Inventor 游飞殷为民何松柏王华东张希坤曾军
Owner HUAWEI TECH CO LTD