OTL(无变压器单端推挽乙类功率放大器)功放电路在放大正弦波信号时,在理想条件下,其效率可高达78.5%,比最高效为50%的甲类功放高出许多.另外,由于去掉了变压器或扼流圈,因而易于集成化;有较好的线性,而且易于进行线性校正;同时,对输出管的耐压要求也大为降低.这些优点使该电路在电视机的场扫描输出级中得到了广泛的应用.然而, OTL (transformerless single-ended push-pull Class B power amplifier) ​​amplifier circuit in the amplification of the sine wave signal, under the ideal conditions, the efficiency of up to 78.5%, higher than the most efficient 50% Class A amplifier much higher.In addition, Due to the removal of the transformer or choke, and therefore easy to integrate; have better linearity, and easy to linear correction; the same time, the output tube voltage is also greatly reduced. These advantages make the circuit in the TV field Scan the output stage has been widely used.However,