Abstract
This work describes the design of a 16 point analog domain FFT using a Charge Re-use Analog Fourier Transform (CRAFT) engine. The circuit relies on charge re-use to achieve 47 dB average output SNDR on an instantaneous input bandwidth of 5 GHz, and consumes only 3.8 mW (12.2 pJ/conv.). The CRAFT engine is used as a wide-band, low power RF front-end channelizer for software defined radio (SDR) applications. The paper also discusses the handling of circuit non-idealities for the CRAFT design: their significance, modeling, and circuit techniques for their mitigation. These techniques enable this implementation to achieve a large dynamic range even at high speeds.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1199-1211 |
| Number of pages | 13 |
| Journal | IEEE Journal of Solid-State Circuits |
| Volume | 48 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 2013 |
Keywords
- Analog integrated circuits
- Analytical models
- Channel bank filters
- Cognitive radio
- Demodulation
- Discrete Fourier transforms
- Discrete cosine transforms
- FET integrated circuits
- FIR filters
- Fast Fourier transforms
- Filtering
- Integrated circuit modeling
- Integrated circuit noise
- Linear circuits
- MOS integrated circuits
- Mixed analog digital integrated circuits
- Modulation
- Multiple signal classification
- Multiplying circuits
- OFDM
- Passive circuits
- Passive filters
- Phase shifters
- RF signals
- Radio spectrum management
- Radio-frequency integrated circuits
- Sampled data circuits
- Signal analysis
- Signal detection
- Signal sampling
- Signal to noise ratio
- Software defined radio
- Software radio
- Spectral analysis
- Summing circuits
- Switched capacitor
- Switched circuits
- Transforms
- Very high speed integrated circuits