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Reduce circuit size using PSoC components: How? | Cypress Semiconductor

Reduce circuit size using PSoC components: How?

Summary: 1 Reply, Latest post by Gautam Das on 24 Aug 2011 04:37 AM PDT
Verified Answers: 0
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user_134344396's picture
56 posts

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.

dasg's picture
Cypress Employee
730 posts

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.

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