SU919044A1 - Amplifier - Google Patents

Description

(SM AMPLIFIER

one

The invention relates to telecommunications and can be used to enhance high-frequency vibrations with high efficiency.

A known amplifier comprising an amplifier stage with a power source, first high and low frequency filters having the same cutoff frequency, a load and a ballast resistor, the inputs of the first filters connected to the output of the amplifier stage, and the load ij connected to the output of the first low frequency filter.

However, the known amplifier has low efficiency.

The purpose of the invention is to increase efficiency.

To achieve this goal, in the amplifier, the output of the first high-pass filter is connected via a serially connected transformer, rectifier / spruce and the second high-pass filter with a ballast resistor, the output of the rectifier is connected through the second filter

power source, the second high and low frequency filters have the same cutoff frequency.

The drawing shows a circuit diagram of an amplifier.

The amplifier contains an amplifier cascade 1, a power supply 2, filters 3 and U of the highest frequencies, filters 5 and 6 of the lower frequencies, a load 7, a transformer 8, a rectifier 9, a ballast resistor 10.

The amplifier works as follows.

Square Voltage

Claims (1)

ts the meander from the amplifier stage 1 is fed to the inputs of filters 3 and $. Here, the voltage of the first harmonic passes through the low-pass filter 5 and enters the load 7, and the harmonics pass through the high-pass filter 3 and pass through the transformer 8 to the rectifier 9, where it straightens and sends to the filter inputs and 6, Since all the filter pairs are mutually complementary, the load for filter 3 is kept purely active. The constant component of the rectified voltage through the filter 6 enters the power supply 2 and the variable component / power is already much less. ) - Erez filter frequencies higher J e enters the ballast resistor 10, transformer ratio vybi raets 8 such that the voltage at output 6 is equal .filtra voltage power source 2. Thus, the proposed amplifier provides high efficiency. An amplifier comprising a power amplifier stage, four high and low frequency filters with the same cutoff frequency, a load and a ballast resistor, the inputs of the first filters are connected to the output of the amplifying stage, and the load connected to the output of the first low frequencies characterized in that, in order to increase efficiency, the output of the first high-pass filter is connected via a series-connected transformer, rectifier and second high-pass filter to the ballast resistor, the output ypr DC converter is connected via a second filter lower frequencies with the power source, wherein the second filters of higher and lower frequencies have the same cutoff frequency. Sources of information taken into account during the examination 1. Radio transmitting devices. Ed. V.V.ShaHgild, M., Sv.z, 1980, p. 56., rice, 2.48 {prototype);