| 摘要 |
An amplifier for amplifying a bipolar ac signal having a rectifier with its input coupled to the ac input signal for producing at its output a unipolar pulsating dc signal with the half waves of the ac bipolar input signal being shifted in phase by 180 . The amplifier circuit is coupled to the output of the rectifier for amplifying the unipolar pulsating dc signal. A recovery circuit such as an inverter has its input connected to the amplifier output for recovering the bipolar pulsating ac signal from the unipolar pulsating dc signal, and produces an amplified copy of the bipolar ac input signal. The amplifier uses at least one transistor having a dc voltage reference potential applied to its emitter. At least one input circuit has its input connected to the bipolar ac signal, and converts the signal to a unipolar pulsating dc signal for connection to the base of the transistor. The output inverter circuit, connected to the collector and emitter provides a bipolar pulsating amplified ac signal from the amplified, unipolar pulsating dc signal in the form of an amplified copy of the bipolar ac input signal. There is also a power supply for generating a dc voltage from an ac voltage, having a rectifier coupled to the ac voltage on the input side, and a smoothening circuit on its output. The smoothening circuit provides additional secondary dc voltage half waves on the rectifier output from the primary dc voltage half waves which are shifted in time so that they are disposed in the gaps between the primary dc voltage half-wave peaks to fill in the gaps. A further embodiment uses a transistor which has a base system of a complex crystalline macromolecule.
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