SU1573529A1 - Amplitude modulator - Google Patents

Abstract

The invention relates to radio engineering. The purpose of the invention is to reduce the non-linear distortion of the envelope of the amplitude-modulated signal. For this, the HF modulated signal is fed to the primary winding 2 of the input transformer 1. The low modulation signal is fed through the capacitor 21 to the middle terminals of the second secondary winding 4 and the first primary winding 7. The same terminals through the resistor 20 from the source 19 of the constant voltage receives the unbalancing voltage, which affects the first secondary winding 3, the first primary winding 7 and the first diode bridge 9, as well as the second secondary winding 4 of the input transformer 1, the second primary the winding 8 of the output transformer 5 and the second diode bridge 14. If the voltage of the source 19 is positive, then the first and fourth diodes 10 and 13 of the diode bridge 9, as well as the first and fourth diodes 15 and 18 of the second diode bridge 14 will open. An output signal proportional to the differential resistance of the shifted diodes is applied at the terminals of winding 6. With a negative voltage, diodes 11, 12, 16 and 17 will be open. 2 Il.

Description

FIG. 2

Editor N.Rogulich

Compiled by A.Soloviev

Tehred L. Serdnzhova Proofreader M. Maksimishinets

Order 1646

Circulation 656

VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5

Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101

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Claims (1)

Claim I An amplitude modulator containing an input transformer consisting of one primary winding and two secondary windings, an output transformer consisting of two primary windings and one secondary winding, the first and second diode bridges, and a resistor. Moreover, the connection point of the anode of the first diode and the cathode of the second dio5 157: yes, the first diode bridge is connected to the beginning of the first primary winding of the output transformer, the connection point of the cathode of the first diode and the anode of the second diode of the second diode bridge is connected to the beginning of the second primary winding of the output transformer, the terminals of the primary winding of the input transformer are the input of the modulated signal of the amplitude modulator, and the conclusions the secondary windings of the output transformer are the output of the amplitude modulator, characterized in that, in order to reduce non-linear distortion of the envelope a of a plateau-modulated signal, a capacitor is introduced, and the middle terminals of the second secondary winding of the input transformer and the first primary winding of the output transformer are combined and connected to one of the terminals of the resistor, the other input of which is connected to the output of the introduced constant voltage source, 25 connection point of the third cathode the diode and anode of the fourth diode of the first diode bridge is connected to the end of the first primary winding of the output transformer, the connection point of the anode of the third diode and the cathode of the fourth the diode of the second diode bridge is connected to the end of the second primary winding of the output transformer, the connection point of the cathode of the first diode and the anode of the third diode of the first diode bridge is connected to the beginning of the first secondary winding of the input transformer, the connection point of the anode of the second diode and IQ of the cathode of the fourth diode of the first diode bridge is connected to the end of the first secondary winding of the input transformer, the connection point of the anode of the first diode and the cathode of the third diode of the second diode bridge is connected to the beginning of the second secondary winding of the input transformer, the connection point of the cathode of the second diode and ... the anode of the fourth diode of the second the diode bridge is connected to the end of the second secondary winding of the input transformer, the middle terminals of the first secondary winding of the input transformer and the second primary winding of the output trans the formatter is connected to a common bus, one capacitor terminal is connected to the middle terminal of the second secondary winding of the input transformer, and the other capacitor terminal is the input of the modulating signal of the amplitude modulator. Fig.?.