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一个性能良好的晶体管稳压电源的质量指标,主要取决于采样电路、基准电压和比较放大器环节,其中基准电压源是一关键环节。如基准电压有变化,即使电网电压和负载均不变,也会破坏电源输出稳定性。目前基准电压多采用半导体稳压管实现,例如用标准稳压管2DW7C,其输出电压6V左右,电压稳定性约1×10~(-4),温度系数约5×10~(-5)/C°。但对于高稳定性质量来讲,往往还不能满足要求。七十年代国外曾报导利用场效应管恒流特性获得基准电压的方法,其稳定性可达10~(-6)数量级,接近标准电池的电压稳定性。我们根据这种原理,研制了一个基准电压源,代替标准稳压管,其输出电压稳定性约为5×10~(-6)/1小时,
A good performance transistor power supply quality indicators, depending on the sampling circuit, the reference voltage and the comparison amplifier link, in which the reference voltage is a key link. If the reference voltage changes, even if the grid voltage and load are unchanged, will also damage the power output stability. For example, the standard voltage regulator 2DW7C has an output voltage of about 6V, a voltage stability of about 1 × 10 -4, a temperature coefficient of about 5 × 10 -5 / C °. However, the quality of high stability is often not enough to meet the requirements. Seventies have reported the use of FET constant current characteristics of the reference voltage to obtain the method, the stability of up to 10 -6 (-6), close to the standard battery voltage stability. According to this principle, we developed a reference voltage source, instead of the standard regulator, the output voltage stability of about 5 × 10 -6 / 1 hour,