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PSR of Bandgap Reference

带隙基准电路的PSR

PSR of Bandgap Reference Recently, the performance of the chip I designed in my work got degraded by the insufficient PSRR of a bandgap reference, so I did some investigation about this topic and ...

Posted by Bohao on August 23, 2025

Understnading of Circuit Noise

深入理解电路噪声

Understanding of Circuit Noise To begin with… Noise is one of the most important requirements in circuits design, espeially in signal-chain circuits, such as ADC, amplifier or band-gap reference....

Posted by Bohao on February 24, 2025

Loop Design of PLLs

锁相环的环路设计

Loop Design of PLLs Reference: [Analysis and Design of Phase-Locked Loops] — Prof. Shen-Iuan Liu [https://en.wikipedia.org/wiki/Q_factor] [https://blog.csdn.net/luohuo...

Posted by Bohao on July 1, 2024

Sample & Hold (S&H) Circuits

采样保持电路

Sample & Hold (S&H) Circuits Introduction Sample & Hold (S&H) circuits are a kind of circuit which is widely used in analogue and mixed-signal circuits and they are also referred...

Posted by Bohao on December 17, 2023

The Speed of the Op-amp

Op-amp的速度

The Speed of the Op-amp In Mixed-signal design, or to be concrete, in switched-capacitor circuit design, a scene is often encountered: the op-amp needs to charge a certain capacitor. In this scena...

Posted by Bohao on September 11, 2023

Learn Band-gap Reference from scratch

带隙基准学习笔记

Learn Band-gap Reference from scratch Band-gap reference (BGR) is a voltage reference that is independent of temperature and power supply, or it can be seen as an “ideal” voltage source in terms o...

Posted by Bohao on July 23, 2023

Cadence Virtuoso Simulation Tips (Updating)

Cadence Virtuoso仿真提示（更新中）

Cadence Virtuoso Simulation Tips (Updating) 1. Some parameter settings in Transient simulation Reference: https://web.engr.oregonstate.edu/~moon/kaj/cadence.html#top Accuracy There are some p...

Posted by Bohao on July 19, 2023

Understand the Noise-Shaping

深入理解噪声整形

Understand the Noise-Shaping From the beginning… The Noise-Shaping(NS) term is quite important for the Mixed-signal designer and this blog is also the note when I learnt and designed an Oversampl...

Posted by Bohao on June 11, 2023

How to understand Miller Theorem

深入理解密勒定理

How to understand MILLER’S Theorem Miller’s theorem To begin with, a brief introduction to Miller’s theorem is necessary. In short, according to the diagram above, in order to make the curre...

Posted by Bohao on February 17, 2023

Spice Model Parameters

Spice Model解读

Spice Model Parameters Spice Name Symbol Model Parameter Units Default Level Model Type 1 ...

Posted by Bohao on November 1, 2022

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