| 摘要 |
FIELD: radio engineering; low-frequency amplification. SUBSTANCE: amplifier has series-connected signal source 1, adder 2, and relay member 3; push-pull switching stage 4; low-frequency filter 5; negative feedback circuit 6; first and second threshold elements 9 and 10 whose inputs are connected to signal source output. Output of relay member 3 is connected to one input of stage 4 through switch 11 and to other input, trough switch 12. Newly introduced in amplifier are low-value resistor 8 connected in series with load 3, comparator 16 whose inputs are connected to resistor 8, two OR gates 13, 14, and NOT gate 15. Depending on direction of load current, just the arm of stage 4 ensuring this load current remains serviceable irrespective of inhibit signal arriving from threshold elements. EFFECT: reduced distortions at inductive and electromagnetic loads with high amplitude of input signal. 1 dwg
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