0
\$\begingroup\$

I have an amplifier model circuit where I've determined the load (speaker) voltage (using its peak power output and its resistance) and measured the open-circuit voltage.

How can I work out the Thevenin resistance?

I am familiar with finding Rth when condensing a standard linear circuit but struggle to work backwards.

Any help or suggestions are much appreciated.

\$\endgroup\$
2
  • \$\begingroup\$ $$R_{TH} = R_L \left( \frac{V_{OPEN}}{V_{LOAD}}-1\right)$$ Where V_open is a open-circuit voltage and V_laod is an output voltage with the load connected. \$\endgroup\$
    – G36
    Apr 30 '20 at 8:28
  • \$\begingroup\$ @G36 Thanks, much appreciated! \$\endgroup\$
    – Hendrik
    May 1 '20 at 2:22
0
\$\begingroup\$

$$R_{TH} = R_L \left( \frac{V_{OPEN}}{V_{LOAD}}-1\right)$$

Where V_open is the open-circuit voltage and V_load is an output voltage with the load connected.

Provided by user G36.

\$\endgroup\$
1
  • \$\begingroup\$ @Michael Thanks, need to learn how to do that \$\endgroup\$
    – Hendrik
    May 1 '20 at 10:24

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.