SU1728960A1 - Wide-band amplifying device - Google Patents

Abstract

The invention relates to radio engineering. The purpose of the invention is to increase the efficiency. The wideband amplifier device contains an input power divider 1, an amplitude-phase corrector 2, an output amplifier 3, an additional paraphase amplifier 4, a controlled amplitude-phase corrector 5. The purpose of the invention is achieved by ensuring that the additional paraphase amplifier 4 works only the error signal amplification mode, without amplification of the useful signal, due to the automatic selection of the required amplitude and phase of the useful signal at the input of the output amplifier 3. 2 Il.

Description

The invention relates to radio engineering and can be used in communications and television transmitters.

FIG. 1 is an electrical block diagram of the device; in fig. 2 shows an example of the implementation of a controlled amplitude-phase corrector.

The device contains an input power divider 1, an amplitude-phase corrector 2, an output amplifier 3, an additional paraphase amplifier 4, a controlled amplitude-phase corrector 5, made on a quadrature phase shifter 6, adjustable dividers 7, 71, summing device 8, separation device 9 multiplier x 10, 10 and integrators 11, 111.

The device works as follows.

The input signal through a controlled amplitude-phase corrector 5 is fed to the output amplifier 3, amplified in it and transmitted to the output of the device. The additional paraphase amplifier 4 at the first output tends to repeat the input signal, and if the output voltage of the output amplifier 3 differs in shape from the input voltage, it ensures its correction, which reduces the level of nonlinear distortion of the signal at the output of the device.

Controlled amplitude-phase corrector 5 ensures the achievement of the set goal by equalizing the amplitudes and phases of the signal voltage at the input and the first output of the additional para-phase amplifier 4, which eliminates its operation in the gain mode of the useful signal.

As a controlled amplitude-phase corrector 5, the device shown in FIG. 2 and working as follows. The input signal in the wideband quadrature phase shifter 6 is split into two components with a phase shift of 90 °, which

sl C

x |

hO

with

U o o o

through adjustable dividers 7,7, are fed to the inputs of the output summing device 8. The control signal of the controlled amplitude-phase corrector is fed to the input splitter 9, from each of the outputs of which, through multipliers 10, 10 and integrators 11, 111, the signals go to the control divider inputs 7, 7, and the second input of each of the multipliers 10, 101 is connected to the corresponding output of the quadrature phase shifter 6. This construction leads to multiplication in the multiplier x 10, 10 of the in-phase and quadrature oscillator Aulus constituent input signal and the control signal acting on the controllable amplitude and phase corrector followed by isolation using only the low-frequency integrator 11,111 multiplication products, which are caused by constituents of the frequency control signal coincides with a frequency control input and the obtained

0

five

0

low-frequency signals, adjustable dividers 7, 71 until the control signal of the controlled amplitude-phase corrector 5 becomes close to zero.

Claims (1)

The invention includes a wideband amplifying device containing an input power divider, an output amplifier, an amplitude-phase corrector, and an additional amplifier made on a transistor, whose input is connected to the first output of the power input divider via the amplitude-phase corrector, and the output is connected to the output amplifier output, which is different In order to increase the efficiency, the additional amplifier is made paraphase, between the second output of the input power divider and the input of the output amplifier is introduced l emy amplitudnofazovy corrector whose control input is connected to the inverted output of paraphase amplifier. FIG. 7 FIG. 2