Tuesday, April 12, 2011

Bass Treble Baxandall Tone Control circuit

This bass and treble tone controller circuit is based on the classic Baxandall tone control circuitry and provides a maximum cut and boost of around 15dB at 10kHz and 100Hz. Since the Baxandall tone control circuit is a passive design, all frequencies are amplified. The position of the bass and treble control potentiometers and reactance of the capacitors affect the audio response.
Bass Treble Baxandall Tone Control Circuit
CA3140 Single Op-Amp PinOut

The circuit up there is very popular Baxandall tone control configuration circuit. This Baxandall tone control has unity gain (gain=1) at midband and uses standard linear potentiometers. Low value, low cost, and small size capacitors is possible to apply because of the very high input impedance of CA3140. The frequency point is set at 100Hz and 10KHz by 15dB bass treble boost and cut. Full peak to peak output is available event at 20KHz because of excellent high slew rate characteristic of this opamp. The gain of this amplifier is decreased -3dB from flat response at 70KHz, and it’s beyond audible frequency range to make sure this tone control circuit handle the audio range perfectly.

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