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JFET - BJT Operational Amplifier Input Stage

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JFET - BJT Operational Amplifier Input Stage
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This circuit can be used as a high-impedance input of an operational amplifier. The p-channel JFET is configured as a source follower and its output is coupled to an emitter follower NPN transistor. The Vbe of NPN BJT, the voltage drop across Rlim and Veb of PNP BJT limits the source to drain voltage (Vsd) of the JFET.

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Copy of JFET - BJT Operational Amplifier Input Stage

Sak04

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GGoodwin

1116 Circuits

Date Created

6 years, 11 months ago

Last Modified

5 years, 11 months ago

Tags

  • op amp
  • operational amplifier
  • bifet
  • jfet
  • source follower
  • jfet input stage
  • operational amplifier input stage
  • op amp input stage

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