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热词
    • 105. 发明授权
    • Field effect transistor amplifier
    • 场效应晶体管放大器
    • US4021751A
    • 1977-05-03
    • US628147
    • 1975-11-03
    • Tadao Suzuki
    • Tadao Suzuki
    • H03F1/30H01L29/00H03F3/185H03F3/20H03F3/26H03F3/30H03F3/45H03F3/16
    • H03F3/45408H01L29/00H03F3/1855H03F3/26H03F3/3044H03F3/45466H03F2200/516H03F2203/45498H03F2203/45702
    • A field effect transistor amplifier has a signal input circuit which preferably includes an A-class amplifier, a driving stage having first and second FETs driven in the same phase relation by an input signal applied to their gate electrodes from the signal input circuit, a first voltage source connected to the source electrodes of the first and second FETs, a resistor connected between the drain electrodes of the first and second FETs, an output stage having third and fourth FETs with the gate electrodes of the latter being connected to opposite ends of the resistor so that the voltage across the latter is applied as the DC bias voltage for the FETs of the output stage, a second voltage source connected to the drain electrodes of the third and fourth FETs, and an output terminal connected to the source electrodes of the third and fourth electrodes which are connected to each other. At least the FETs of the output stage are triode characteristic FETs and, if the gain of the A-class amplifier in the signal input circuit is insufficient, the FETs of the driving stage are also triode characteristic FETs.
    • 场效应晶体管放大器具有信号输入电路,其优选地包括A级放大器,驱动级具有通过从信号输入电路施加到其栅电极的输入信号以相同的相位关系驱动的第一和第二FET,第一 连接到第一和第二FET的源电极的电压源,连接在第一和第二FET的漏电极之间的电阻器,具有第三和第四FET的输出级,其后面的栅电极连接到 电阻器,使得后者的电压作为输出级的FET的直流偏压施加,连接到第三和第四FET的漏电极的第二电压源和连接到第三和第四FET的源电极的输出端子 第三和第四电极彼此连接。 至少输出级的FET是三极管特性FET,如果信号输入电路中A级放大器的增益不足,则驱动级的FET也是三极管特性FET。