H - Electricity – 03 – F
Patent
H - Electricity
03
F
330/104
H03F 3/72 (2006.01) H03F 3/30 (2006.01)
Patent
CA 1168717
D-23,099C SWITCH MODE - CLASS B POWER AMPLIFIER By Edward T. Ball and John E.R. White Abstract of Disclosure An input signal is applied to the inverting input of a class B amplifier and to the input of a limiter circuit. The square wave signal from the limiter is applied to the input of a switching amplifier which drives this amplifier between V and ground at the switching rate established by the input signal; thereby, obtaining a power control signal. The power control signal is applied to one terminal of a load and to the non-inverting input of said class B amplifier. Ignoring the input signal to the amplifier, this switches the output of the class B amplifier between V and ground at the same rate and in phase with the output from the switching amplifier. m e gain of the input signal path in the amplifier is such that the input signal will just drive the output between V and ground. The switching action of the power control signal in combination with the input signal then causes the output signal across the load to have the same characteristic as the input signal but with a peak-to-peak amplitude of 2V.
398589
Ball Edward T.
White John E. R.
Ael Microtel Limited
R. William Wray & Associates
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