中国半导体行业协会封装分会会刊

中国电子学会电子制造与封装技术分会会刊

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电子与封装 ›› 2025, Vol. 25 ›› Issue (11): 110301 . doi: 10.16257/j.cnki.1681-1070.2025.0130

• 电路与系统 • 上一篇    下一篇

一种40 GSample/s超高速采样保持电路*

赵安1,李浩1,张有涛2,3,罗宁3,张长春1,2,张翼1,2   

  1. 1. 南京邮电大学集成电路科学与工程学院,南京 210023;2. 南京邮电大学射频集成与微组装技术国家地方联合工程实验室,南京 210023;3. 南京国博电子股份有限公司,南京 211153
  • 收稿日期:2025-03-27 出版日期:2025-11-28 发布日期:2025-11-28
  • 作者简介:赵安(2000—),男,江苏徐州人,硕士研究生,主要研究方向为数模混合集成电路设计。

40 GSample/s Ultra-High-Speed Sample-and-Hold Circuit

ZHAO An1, LI Hao1, ZHANG Youtao2,3, LUO Ning3, ZHANG Changchun1,2, ZHANG Yi1,2   

  1. 1. Collegeof Integrated Circuit Science and Engineering, Nanjing University ofPosts and Telecommunications, Nanjing 210023, China; 2. National and LocalJoint Engineering Laboratory of RF Integration and Micro-Assembly Technology, NanjingUniversity of Posts and Telecommunications, Nanjing 210023, China; 3. NanjingGuoBo Electronics Co., Ltd., Nanjing 211153, China
  • Received:2025-03-27 Online:2025-11-28 Published:2025-11-28

摘要: 基于0.7 μm磷化铟(InP)异质结双极型性晶体管(HBT)工艺设计了一款超高速宽带采样保持电路。通过发射极电阻退化结构,有效减小了输入缓冲电路的非线性。开关核电路采用交叉耦合来减小保持模式馈通。后仿结果表明,所设计的电路能够工作在40 GSample/s的采样速率下。在奈奎斯特输入信号频率下,电路工作的无杂散动态范围(SFDR)大于40 dBc。当输入12.1 GHz、-4 dBm的信号时,电路的SFDR可达51 dBc,有效位数约为8 bit。

关键词: 采样保持电路, 超高速, 宽带, 磷化铟, 异质结双极型晶体管

Abstract: An ultra-high-speed broadband sample-and-hold circuit was designed based on a 0.7 μm indium phosphide (InP) heterojunction bipolar transistor (HBT) process. The nonlinearity of the input buffer is effectively reduced through an emitter resistor degradation structure. The switch core circuit employs cross-coupling to reduce feedthrough in hold mode. Post-simulation results show that the designed circuit operates stably at a sampling rate of 40 GSample/s. At the Nyquist input signal frequency, the circuit achieves a spur-free dynamic range (SFDR) exceeding 40 dBc. When a 12.1 GHz, -4 dBm signal is input, the circuit achieves an SFDR of 51 dBc, with an effective number of bits of approximately 8 bit.

Key words: track-and-hold circuit, ultra-high-speed, broadband, indium phosphide, heterojunction bipolar transistor

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