---
# System prepended metadata

title: 'Issue: Brief about v2 pre-amp board'
tags: [HW-Circiut, DeWei, issue]

---

## 1. I/V converter

* V1
  * ![](https://i.imgur.com/H39EFWD.png)
* V2
  * ![](https://i.imgur.com/vXMxZtW.png)
* IDEA: [DS of LTC6268-10](https://www.analog.com/media/en/technical-documentation/data-sheets/626810f.pdf)
  * ![](https://i.imgur.com/KJyVIds.png)
  * ![](https://i.imgur.com/uyg8Gcg.png)
* Extreme condition: Rfb<< and Cfb<< would be unstable (oscillation)
  * Rfb=10k, Width=130ns, Cfb=1pF
    * ![](https://i.imgur.com/vzKDVoV.png)
  * Rfb=10k, Width=130ns, Cfb=0.3pF
    * ![](https://i.imgur.com/g6lbygz.png)

## 2. Power

* V1
  * ![](https://i.imgur.com/HuMWzp4.png)
* V2
  * ![](https://i.imgur.com/hST3muZ.png)
* Note: ignore Filter/decouple capacitor
* Boost converter should be verify
* [Generating Negative and Positive Voltage Rail With Boost
Converter TLV61048](https://www.ti.com/lit/an/slvaej3/slvaej3.pdf)
## 3. Pulse shaping

Pending