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AN105 - FETS AS VOLTAGE-CONTROLLED RESISTORS

Key Features

  • oltage (V) VDS.
  • Drain-Source Voltage (V) Figure 8. VCR7N Without Feedback Figure 9. VCR7N With Feedback. Table 1: Distortion vs. Temperature Without Feedback Temperature (_C) +125 +25.
  • 55 With Feedb.

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Datasheet Details

Part number AN105
Manufacturer Vishay
File Size 121.50 KB
Description FETS AS VOLTAGE-CONTROLLED RESISTORS
Datasheet download datasheet AN105 Datasheet

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Full PDF Text Transcription (Reference)

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www.DataSheet4U.com AN105 FETs As VoltageĆControlled Resistors Introduction: The Nature of VCRs A voltage-controlled resistor (VCR) may be defined as a three-terminal variable resistor where the resistance value between two of the terminals is controlled by a voltage potential applied to the third. For a junction field-effect transistor (JFET) under certain operating conditions, the resistance of the drain-source channel is a function of the gate-source voltage alone and the JFET will behave as an almost pure ohmic resistor. Maximum drain-source current, IDSS, and minimum resistance rDS(on), will exist when the gate-source voltage is equal to zero volts (VGS = 0).