Lm13720 -

) of the amplifier—in simple terms, you can control the gain of the chip using a voltage. Key Features of the LM13700

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

Keep inputs below 1mA to avoid unhappy transistors.

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?

These integrated diodes reduce distortion, allowing higher input signal levels—crucial for audio quality.

's datasheet is packed with circuits that make it perfect for creative audio processing: 1. Voltage-Controlled Amplifier (VCA)