Electronic apparatus for biological research Electronic apparatus for biological research . electronicappara00dona Year: 1958 HT+ Anode current Anode current HT- Figure Figure Figure that the screen current must be held constant, which again requires that the screen-cathode voltage be somehow held steady. In the coupled pentode cathode follower this may be achieved by returning the screen decoupling capacitance to the cathode and not to earth {Figure ). In the direct coupled pentode cathode follower the screen is most conveniently supplied 172

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