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Transmission line tuning switch power amplifier

A technology of transmission line and switch, applied in the field of tuning switching power amplifier

Inactive Publication Date: 2003-08-20
MA COM EUROTEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, the series inductor 120 negatively impacts the size of the amplifier 100, while the combination of the shunt capacitor 116 may produce an undesired impedance transformation at the output of the amplifier 100

Method used

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  • Transmission line tuning switch power amplifier
  • Transmission line tuning switch power amplifier
  • Transmission line tuning switch power amplifier

Examples

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Embodiment Construction

[0021] image 3 An embodiment of a tuned switching power amplifier 126 according to the present invention is shown. The amplifier 126 includes a switch 128 for receiving an input signal from a signal source 130, a load network 132 connected between the switch 128 and a load 134 across the switch 128 to generate a transient response and provide an output signal to the load 134 for providing Switch 128, load network 132, and load 134 supply DC power to DC power source 136. In summary, during operation of amplifier 126, load network 132 creates a shunt inductance and shunt capacitance across switch 128 to create a transient response across switch 128 that ensures The voltage remains low until the current through switch 128 is substantially zero, and the voltage and time derivative of the voltage across switch 128 are guaranteed to be substantially zero before the switch transitions from off to on. Therefore, the actual voltage across the switch 128 and the actual current flowin...

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Abstract

A tuned switching power amplifier having a switch for receiving an AC input signal. The switch controls the application of DC power to a load through a load network. The load network develops a parallel inductance and a parallel capacitance across the switch that minimizes power losses associated with the switch by creating a transient response across the switch that insures that, when the switch transitions from on to off, the voltage across the switch remains low until the current trough the switch reaches zero, and that, when the switch transitions from off to on, the voltage across the switch is zero and has a substantially zero time derivative prior to when the switch transitions from off to on. The parallel inductance is developed by a transmission line of a determined electrical length.

Description

technical field [0001] The invention relates to an amplifier, in particular to a tuned switch power amplifier. Background technique [0002] Amplifiers are commonly used to increase the strength of electrical signals. To increase the strength of the electrical signal, typically, the electrical signal is used to control the flow of energy from a DC power source, such as a battery, to produce an output signal that varies in the same manner as the electrical signal, but with a larger amplitude. In general, it is desirable to efficiently amplify electrical signals using the least amount of power, for example to reduce energy costs and increase battery life. [0003] A method of efficiently amplifying electrical signals is disclosed in US Patent No. 3,919,656, assigned to Sokal et al., entitled "High Efficiency Tuned Switching Power Amplifier," which is incorporated herein by reference. Additionally, US Patent No. 3,919,656 contains a detailed discussion of power amplifiers. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/60H03F3/217
CPCH03F2200/423H03F3/217H03F3/2176H03F3/20
Inventor 安德烈·V·格雷本尼科夫赫伯特·耶格
Owner MA COM EUROTEC