But what makes this decades-old chip still relevant in 2026? Let's dive into the world of OTAs and why the remains indispensable. What is an OTA?
is available from Texas Instruments and various distributors. If you'd like to dive deeper, I can help you with: for a VCA or VCO. Component matching tips to reduce distortion. Alternatives for modern, low-noise designs. What are you planning to build? lm13700.pdf - Texas Instruments
) pin. By injecting a small current into this pin, you control the transconductance ( Gmcap G sub m lm13720
The core of many compressors, limiters, and synth modules, a VCA allows you to control the amplitude of a signal with a control voltage (CV). 2. Voltage-Controlled Filter (VCF)
can generate sine, triangle, and sawtooth waves for analog synthesizers. 4. Audio Compressors/Sustainers But what makes this decades-old chip still relevant in 2026
A classic application is the compressor pedal (like the MXR Dyna Comp), where the output signal is used to drive the IABCcap I sub cap A cap B cap C end-sub pin, reducing gain when the input is too loud. Tips for Working with the It typically runs on
can be used to build resonant low-pass, high-pass, or band-pass filters where the cutoff frequency is swept by a CV. 3. Voltage-Controlled Oscillator (VCO) By controlling the charging current of a capacitor, the is available from Texas Instruments and various distributors
Keep inputs below 1mA to avoid unhappy transistors.