I want to use an LM13700 as a voltage controlled resistor, and I want it to act like a rheostat. When will it act non-linearly?

The description of this circuit is on page 15 of the datasheet, and the circuit diagram is on page 16, figure 28.

I intend to use two of them to produce a variable voltage divider for an audio signal. I am worried that the resistance might vary with regards to frequency, temperature etc.

  • \$\begingroup\$ Show a bit of research, doc, and post links to the datasheet so we don't all have to look for it. If you give some details on your application you might get some useful advice in the answers and comments. \$\endgroup\$ – Transistor May 7 '16 at 21:52
  • \$\begingroup\$ If you want answers to this question, it would be advised that since people volunteer their time here, that you make it as easy as possible for them. For example embedding links to data sheets, even embedding pictures is advised (of course you must provide attribution) as some people won't follow links. Roughly speaking, the effort that others will put into an answer will be proportional to the effort you put into the question. \$\endgroup\$ – placeholder May 7 '16 at 21:55
  • \$\begingroup\$ Please specify what it is your trying to control. The LM13700 is for controlling audio levels for VCO's, mixing boards, etc. It is not designed to control power. Use of the word "rheostat" implies the control of power. Please clarify these issues. \$\endgroup\$ – Sparky256 May 7 '16 at 22:07
  • \$\begingroup\$ Edited the question to add details. \$\endgroup\$ – Dr. John A Zoidberg May 7 '16 at 22:17
  • \$\begingroup\$ Why aren't you using the stereo volume control circuit of page 14, Figure 22? Again, "rheostat" is the wrong word for an audio application. \$\endgroup\$ – Transistor May 7 '16 at 22:24

Your Answer

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

Browse other questions tagged or ask your own question.