Design of Track/Hold (T/H) Circuit of Broad Bandwidth and High Speed Pipeline Structure ADC Based on

• 出 处: Journal of Electronic Science and Technology of China
• 发表日期: 2007年04期
• 关键词: switch aperture Pipeline Bandwidth considerably capacitor pipeline clock bandwid

A track/hold (T/H) circuit of broad bandwidth high speed pipeline structure ADC based on the super frequency application is designed in the paper. Some main factors affecting SNR of high speed ADC, such as aperture uncertainty, switch capacitor, and MOS switch, are analyzed. In the circuit, the full-differential structure and the bottom plate sampling technique are adopted to optimize the switch capacitors and MOS switches. The result based on the Spectre simulation on 0.35μm Bi- CMOS technology indicate that the aperture uncertainty, charge-injection, and non-linearity of clock feed-through are considerably restrained and the performance of T/H circuit is enhanced

A main channel affecting SNR of high speed ADC, such as aperture uncertainty, switch capacitor, and MOS The result based on the specter simulation on 0.35 μm Bi-CMOS technology indicate that the aperture uncertainty charge-injection, and non-linearity of clock feed-through are quite restrained and the performance of T / H circuit is enhanced