摘要
电子管功率放大器中,为了驱动互补推挽结构的功率输出电路,其前级放大电器需使用倒相电路。以电子管微变等效电路分析为基础,针对共阴式、分负载式、分压式、自平衡式4种常见倒相电路进行了理论计算,得出了单臂电压增益和双臂净输出电压增益的解析表达式,并利用仿真软件对这些结果进行了验证,为电子管前级放大器的设计提供了理论依据。
In vacuum tube amplifier circuit, in order to drive the structure of power complementary push-pull output circuit, the preamp appliances need to use the inverted amplifier circuita Based on vacuum tube slight variation equivalent circuit analysis, four kinds of inverted amplifier circuits usually used in vacuum tube headphone amplifier are analyzed. Common cathode, load sharing, voltage sharing, and self--balancing are calculated in theory, and the analytic expressions of arm voltage gain and a net exporter of arms Voltage Gain are deduced. The analyzed result is verified by using simulation software. The calculation methods are provided for the design of preamplifier.
出处
《电声技术》
2010年第11期41-44,47,共5页
Audio Engineering
基金
西安工程大学科研项目(2010XG28)
关键词
共阴式
分负载式
分压式
自平衡式
电子管
微变等效
common cathode
load sharing
voltage sharing
self-balancing
vacuum tube
slight variation equivalent circuit
