2016年9月23日 · Negative Resistance and an Amplified Radio Receiver with a Homemade Solid State Device

2021年1月22日 · TLDR: In many radio receivers tuned RLC circuits are used as a means to filter out the wanted signal and suppress unwanted signals. In a regenerative receiver the "R" in RLC is made negative which makes the LC tank an oscillator with high a quality factor (small bandwidth) making the receiver very sensitive.

2002年11月20日 · RF amplifier made from homemade zinc negative resistance device is connected to crystal set in a regenerative receiver configuration.

Actually negative resistor oscillator is a method of understanding the circuit, not the circuit name. it's identical, loop Gain>1 identical to gm>1/Rp. (some negative resistance...

2010年12月27日 · The negative-resistance characteristic is available from low audio frequencies, dependent upon the size of the coupling condenser compared with the size of the resistors in series with the electrodes, to frequencies of the order of 60 mc, at which transit-time effects disturb the relations.

The RF rise is due to the effect of the negative resistance during sampling. The RF decay is the time taken for the tank to drain its oscillations, and the relaxation time is the time taken for the circuit itself to “recover”.

Oscillators can be designed based on the two different method: negative resistance method and positive feedback method. Since a transistor oscillates at certain frequency, this report is based on the negative resistance oscillator condition. The first step for designing the oscillator is to choose the transistor with s-parameter and

In the analog realm, two sine-wave oscillator types are distinguished: the feedback and the negative-resistance oscillator. Regarding cancellation of resistive losses, both types may be shown to be equivalent, losses being effectively cancelled out by the negative resistance contributed by the active device and associated reactive components.

High Performance Regenerative Receiver. circuit's stability for CW and SSB reception. C7 is the throttle-capacitor REGEN ADJUST control. As C7's capacitance is increased, more RF energy is coupled from Q2's drain to ground (and there- fore the ground end of 1.2); this even- tually initiates an RF oscillation.

Regeneration introduces a negative resistance into a circuit such that its net positive resistance is reduced. Since the circuit’s selectivity, or Q, is equal to its reactance divided by its overall resistance, selectivity is also greatly increased when regeneration is applied.