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I need an ADCs for my system, but I couldn't find them.

Question asked by junheecho on Feb 1, 2017
Latest reply on Sep 18, 2017 by TonyM

First, let me explain the system I want to create.

I am making a system to measure my heart rate wirelessly.
The bio-signal data obtained from the antenna has a voltage level of 2 Vpp through the amplifier and the input frequency is 3 GHz.

Input frequency (center frequency) = 3 GHz,
Input frequency (PRF) = 1 MHz,
ADC Clock frequency = 1.0001Msps,

The ADC will use undersampling to recover information about the amplitude of the original signal.

The final goal is to convert the signal received from the receive antenna into a digital signal through the ADC and send the information back to the PC through the FPGA.

I would attach the explanation file for understanding.


In conclusion, ADCs are needed to complete these systems.

First, wide bandwidth is needed. And should have a BW of approximately 2.5 to 3.5 GHz.
(Because the frequency of our antenna is around 3.0GHz).

Secondly, low sampling speed is required. A low sample rate is required for undersampling rather than oversampling. About 1 Msps to 10 Msps.

Of course, ADCs with these specs are not common, but do not want high performance. I would like you to recommend similar products.