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High Performance, Dual Channel IF Sampling Receiver (cn0140)

This circuit is a high performance, dual channel IF sampling receiver, also called a “main” and "diversity" receiver in base station terminology. The downconverting receiver uses a single IF frequency of 153.6 MHz and includes a dual downconverting mixer, digitally controlled dual VGA, dual ADC, and clock synthesizer. The circuit takes an incoming RF waveform and outputs a dual 14-bit resolution digital data stream. It is optimized for high frequency IF sampling and provides exceptional spurious-free dynamic range (SFDR) performance of 79.61 dBc with a sampling rate of 122.88 MSPS at the high gain setting.

Figure 1. Broadband Dual Channel IF Sampling Receiver (Simplified Schematic: Only One-Half of the Receiver Is Shown. All Connections and Decoupling Not Shown)


  • Downconverts RF frequencies to baseband
  • Utilizes dual channels for IQ demodulation
  • Excellent SFDR when opperating at high gain and high frequency


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