High-Speed Devices and Circuits with THz Applications

5   Multiwavelength Sub-THz Sensor Array with Integrated Lock-In Amplifier and Signal Processing in 90 nm CMOS Technology

Péter Földesy

CONTENTS

5.1   Introduction

5.2   System Architecture

5.2.1   Functional Structure

5.2.2   Optical Considerations

5.2.3   Physical Architecture

5.3   Free Space Coupling

5.4   Mixed-Signal Interface

5.4.1   Analog Front End

5.4.2   Digitalization

5.5   Digital Circuitry

5.5.1   Control and Monitor

5.5.2   Lock-In Detection

5.6   Testability Features

5.7   RF Characterization

5.7.1   Responsivity

5.7.2   Noise

5.7.3   Design Examples

5.7.3.1   Resonant Antenna

5.7.3.2   Broadband Antenna

5.8   Application Examples

5.8.1   Transmission Imaging

5.8.2   Complex Waveform Detection

5.9   Conclusions

Acknowledgments ...