---
# System prepended metadata

title: Regular Meeting (2022.9.26)
tags: [Regular Meeting, DeWei]

---

# Regular Meeting (2022.9.26)

* Append Measurment I owed you
* Report I've arranged
  * [Circuit/Board/Sim](https://hackmd.io/@BelleII-CDC-Trig-NTU-DeWei/r1Fs3fkxj)
    * G = 2 or G = 4
  * [Measurement](https://hackmd.io/@BelleII-CDC-Trig-NTU-DeWei/HJtU2AUes)
* Finished Chassis and other final clean in this week

## Owed test: Add Huge Capacitor(470uF)\*2 on PSU

* Input Signal: 0.1Vpp @ 1MHz
![](https://i.imgur.com/4rWOnZl.png)
* OPA2674(Ext Resistor)
  * ![](https://i.imgur.com/qtat9N2.png)
  * And Zoom In Rising edge
    * ![](https://i.imgur.com/iBPN0z6.png)
  * Overshoot seens to be fine
  * Ripple of noise: 4m Vpp or 2.8m Vrms
* OPA3692(Fixed/Internal Resistor)
  * ![](https://i.imgur.com/oaUdoGU.png)
  * And Zoom In Rising edge
    * ![](https://i.imgur.com/jqvPgIG.png)
  * Overshoot: 8m Vpp (Be expected in the Simulation)
  * Ripple of noise: 4m Vpp or 0.2m Vrms
    * [Vpp -> Rms](https://www.apogeeweb.net/tools/rms-voltage-calculator.html)
      *  Assume noise ripple is sinusoid wave
    * Dr.Wang mentioned 1mV noise, which is Vrms

###### tags: `Regular Meeting` `DeWei`