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混合电路放大器混合电路放大器价格最高,因为他们利用高质量分离元件,对特殊元件需精心选择和匹配。但混合电路运算放大器提供最好的性能。例如,Analog Device公司的52K是低噪声,低漂移非削波放大器。0.01～1Hz峰-峰最大值,它的噪声低于1.5微伏,电压漂移低于1微伏/℃,开环增益大于1兆。混合电路放大器还能提供单片运算放大器所不能得到的高隔离性能。例如,Burr-Brown公司的3452隔离放大器,输入和输出之间隔离高达2000伏。这是用变压器耦合调
Hybrid Amplifiers Hybrid circuit amplifiers are the most expensive because they utilize high-quality discrete components that are carefully selected and matched for specific components. But mixed-circuit op amps provide the best performance. For example, Analog Devices’ 52K is a low-noise, low-drift, non-clipping amplifier. 0.01 ~ 1Hz peak-to-peak maximum noise less than 1.5 microvolts, voltage drift below 1 microvolt / ° C, and open loop gain greater than 1 trillion. Hybrid circuit amplifiers also provide high isolation performance not possible with monolithic op amps. For example, Burr-Brown’s 3452 isolation amplifier isolates up to 2000 volts between input and output. This is the use of transformer coupling tune