- #1

JC2000

- 186

- 16

- Homework Statement
- Find the output waveform for the given circuit.

- Relevant Equations
- Not sure about which equations to use here (if any)

For the following circuit I need to find the output waveform.

A. Conceptually I am at sea here but I will have a stab at it. My though process is as follows :

- At a given instant, the AC voltage is at a fixed value and this value drops (##V_drop##) across the resistor ##R##.
- The voltage (##V_drop##) across the diode and battery as well as the voltage across ##R_L## is constant for a given instant.
- Current flow would be affected across the diode when the voltage across it is less than the cut-in voltage of the diode (0.7 V), however this information seems irrelevant in finding the output voltage.
- At a given instant the AC source is the same as a DC source which is parallel to the voltage source ##V##. Two cases emerge here, one when the instantaneous voltage of the AC source is greater than ##V## and the other when the instantaneous voltage of the AC source is lesser than ##V##. In the former, V acts as a short (?) while in the latter the AC source can be neglected (?!).
- Can't quite put a finger on how V affects the output waveform.

B. I tried to use LTSpice to analyse the circuit, could you please tell me if I have replicated the circuit correctly?

Thank you for your time!