High-Speed, Low-Power Bootstrapped Class-B Driver Amplifier for LCoS Applications

Abstract

In this letter, we present a high-speed, low-power bootstrapped class-B driver amplifier for liquid crystal on silicon (LCoS) applications. The amplifier, incorporating a dynamically adjustable bootstrapping control circuit, doubles the voltage driving range compared to traditional circuits, significantly enhancing system flexibility and performance in high-resolution environments. The design drives a 120-pF capacitive load with a slew rate of 13.65 V/µs and a settling time of 0.685 µs, while consuming only 7-µA quiescent current from a 5-V supply. Fabricated using a 0.18 µm high-voltage complementary metal-oxide-semiconductor (HV CMOS) process, the driver can power multiple pixel columns. Measurement results confirm the circuit's effectiveness in supporting holographic projection and display for LCoS technologies.