Discussion Overview
The discussion revolves around generating a rippled voltage supply using BJT followers in SPICE simulation. Participants explore the design of a circuit that can handle a varying sinusoidal input while maintaining a flat output voltage across a specified frequency range and a desired DC output level.
Discussion Character
- Exploratory, Technical explanation, Homework-related
Main Points Raised
- One participant seeks guidance on modeling a BJT power follower in SPICE, referencing a related thread.
- Another participant offers assistance and requests the SPICE deck for further clarification.
- A participant describes their intended schematic, specifying a sinusoidal input of 0-20 MHz with an amplitude of 200 mV and a target output of around 3.3V, while also noting a load that sinks up to 1A.
- One participant suggests deleting a coupling capacitor (C3) to allow both AC and DC signals at the output.
- A participant expresses uncertainty about which NPN BJTs to use, indicating a trial-and-error approach.
Areas of Agreement / Disagreement
Participants generally agree on the approach to simulate a BJT power follower, but there is no consensus on the specific NPN BJTs to use, and the discussion remains exploratory with various design considerations being discussed.
Contextual Notes
Participants have not settled on specific component choices or design parameters, and there are unresolved considerations regarding the circuit's performance across the specified frequency range.
