1 Reply Latest reply on Aug 24, 2011 4:37 AM by gautam.das.g

    Reduce circuit size using PSoC components: How?

    john.ramshur

      I have an off-chip filter and pre-amp circuit (see figure) that I would like to interface with the PSoC 3/5's ADC.  This circuit buffers, bandpass filters (500 Hz–5 kHz by a four-pole multiple feedback Butterworth filter) and amplifies (1500×) biological signals (microvolt amplitudes).

         

      Could I use PSoC's components (opamp, etc) to save space on my final board layout? This will be a low power (3V or less) design requiring 2-3 day battery life.

        • 1. Re: Reduce circuit size using PSoC components: How?
          gautam.das.g

          Hi Jram,

             

           

             

          PSoC 3/5 has 4 opamps and 4 SC/CT (Switched Capacitance / Continuous Time) blocks.

             

          The circuit which you are intending to build can be implemented on PSoC using the 4 opamps. The external components (resistors and capacitors) can be used as required.

             

           

             

          The buffer (such as voltage follower) can be implemented using opamps or SC/CT blocks.