Multi-cell hybrid power amplifier for test-voltage generation for testing linear/non-linear loads, applies output of summation device to control input of analog amplifier cell

摘要

#CMT# #/CMT# A test voltage generating device (4) comprises a multi-cell switching amplifier (2) and an analog amplifier cell (3) and an output voltage control/regulator (6), with the amplifying elements (2) and (3) connected in series to form a hybrid-power amplifier (4). At the output (85) of the control amplifier acts the dynamically evaluated control difference of the hybrid power amplifier output voltage, and is fed to a first input (86) of a summation element (87). The output (90) of the summation device (87) is applied to the control input (44) of amplifier cell (3). #CMT# : #/CMT# An independent claim is given for a method for controlling a test voltage generating device. #CMT#USE : #/CMT# For low-loss generation of test-voltages for testing linear and nonlinear a.c. voltage loads. #CMT#ADVANTAGE : #/CMT# Enables generation of high-quality test voltage characteristics. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# A series circuit of two cells based on PAM-multi-cell switching amplifier and an analog amplifier is depicted. 2 : Switching amplifier 3 : Analog amplifier cell 4 : Hybrid power amplifier 6 : Output control/regulator 44 : Control input 85 : Control amplifier output 86 : First input of summation element 87 : Summation element 90 : Summation output.