DPPs program key parameters of bandpass filter

Posted on Mar 19, 2013

The three-amplifier implementation of the state-variable filter in Figure 1 provides for second-order bandpass, highpass, and lowpass responses. The strength of the circuit, however, is in the bandpass response (VOUT/VIN), in which it`s easy to achieve high gain (G) and high Q. These two characteristics are important in applications in which selectivity is a key parameter in the filter. The application value of the circuit becomes even greater when DPPs (digitally programmable potentiometers) control and vary the bandpass filter`s center frequency, f0, and passband gain, G.

DPPs program key parameters of bandpass filter
Click here to download the full size of the above Circuit.

Leave Comment

characters left:

New Circuits



Popular Circuits

Control 32 DAC channels via a parallel port
14V Switching Power Supply
Basic Oscillator (Tone Generator) At 1.8 KHz -alarm circuits
three rails regulated power supply
broadband rf power amplifier 18 30 mhz
make circuit diagram
555 timer ic based simple servo
Simple mixer
Dicing With LEDs
Accurate Measurement of Small Inductances