Emitter Follower Oscillation

3. Oscillations occur at 50 kHz and higher. When emitter-follower circuits break into oscillation, they usually do so ...

emitter follower oscillation cured by adding base input resistor?

Yes, adding a base resistor (usually a 50 - 1000Ω) is one solution to RF oscillation of an emitter follower caused by capacitive loading. It ...

Emitter Follower Oscillation - LTspice - Groups.io

I am trying to model emitter follower oscillation to learn how to use LT Spice to determine when to use a base resistor and when it is not necessary.

Undesired oscillation in follower based on RF NPN (in simulation)

All kinds of emitter followers have a strong tendency to oscillate if no suitable base resistor is present ... So just add a resistor in series ...

Base stopper resistors are necessary for output stage emitter followers

It's capacitive loads that emitter-followers don't like - you end up with a Colpitts oscillator. The usual R-C Zobel and R-L series decoupling ...

Emitter Follower Oscillator - EveryCircuit

Emitter Follower Oscillator ... EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, ...

Emitter-Follower - an overview | ScienceDirect Topics

The emitter follower (Figure 5.11(a)) is a buffer stage with high input impedance, low output impedance, and a gain of approximately unity.

Why Circuits Oscillate Spuriously, Part 1: BJT Circuits

This resonance can be damped with sufficient series resistance. In the more common oscillating (unbypassed-collector) emitter-follower, RL is near zero. Damping ...

Curing Circuit Oscillation - Syscomp Electronic Design

– Emitter followers have a tendency to oscillate. This is counter-intuitive, because the voltage gain of an emitter follower is less than one.

Emitter follower oscillator | Consort3's Blog - WordPress.com

It is often held that a passive circuit cannot have gain. This emitter follower circuit with a gain of 1 oscillates.

Transistor Emitter Follower Circuit: Common Collector Amplifier

Collector may need decoupling: On some occasions an emitter follower circuit can oscillate, especially if long leads are present. This can happen when high ...

US3471793A - Emitter-follower circuit stabilized to prevent oscillations

Therefore, the simplest method of stabilizing such emitter-follower circuit is to connect a sufiicient resistance to neutralize the aforementioned negative ...

An Emitter Follower Sinusoidal Oscillator Circuit - Sage Journals

An emitter-follower oscillator circuit is analysed. Expressions for the frequency of oscillation and the condition of oscillation are obtained.

Oscillations when THS3121 is used as voltage follower - TI E2E

In experiments, I found Vo and VDA have serious oscillations, which made me first think it's the DAC layout that brings the bad waveforms.

Emitter followers as Colpitts oscillators - EDN Network

Emitter followers are well known for being prone to oscillation if they're feeding a capacitive load. The trait is shared however, ...

Colpitts Oscillator in 3 Configurations : r/electronics - Reddit

The Emitter Follower is probably the best configuration for it. Note, none of these were really optimized yet (I'm not quite that advanced yet).

Cathode follower oscillator - Wikipedia

This oscillator uses one connection to get a signal from the LC-circuit and feeds an amplified signal back. The amplifier is a long-tail pair of two triodes, ...

When should I use emitter follower to drive??? - Forum for Electronics

emitter follower oscillation Dear all, This question has been confusing me for a while. I know that the emitter follower is to drive low ...

US2972116A - Emitter follower transistor oscillator - Google Patents

In accordance with this invention, a transistor is connected in an emitter follower or common collector circuit configuration which includes parallel resonant ...

Source follower: A misunderstood humble circuit - IEEE Xplore

... oscillator and emitter-coupled multivibrator. It is shown that the input impedance of the follower loaded by a capacitor has a negative real part. This part ...