NEGATIVE RESISTANCE OSCILLATOR WITH ACTIVE BIAS RESISTOR FOR PREVENTING SPURIOUS OSCILLATIONS

摘要

This application describes an active resistor which presents a high resistance, DELTA E/ DELTA I, to alternating current signals while presenting a much lower resistance, E/I, to direct current. The resistor is a two-terminal device including a transistor whose emitter is connected to one terminal and whose collector is connected to the other terminal. A parallel conductive path, to which the transistor base is connected, includes means for maintaining a controlled emitter-base bias. The device is specifically intended for use in IMPATT diode bias circuits.