Discussion Overview
The discussion centers around the mechanisms for lowering the threshold voltage (Vth) of MOSFETs to accommodate lower input voltages, specifically around 100mV, in the context of designing a rectifier. Participants explore various approaches and considerations related to this topic.
Discussion Character
- Technical explanation
- Debate/contested
Main Points Raised
- One participant inquires about different mechanisms to lower or cancel Vth for MOSFETs in low-voltage applications.
- Another suggests that using a low-noise amplifier (LNA) might be a potential solution, referencing external resources.
- A participant raises a question about the availability of an external power supply, indicating that the feasibility of the design may depend on this factor.
- It is noted that Vth can typically be adjusted through Boron threshold adjustment implants for NMOS and the opposite for PMOS, but this is limited by fixed boron doses in standard processes, which only yield MOSFETs with a fixed Vth unless specific instructions are given to the fabrication labs.
Areas of Agreement / Disagreement
Participants express differing views on the feasibility of lowering Vth, with some suggesting methods while others highlight limitations and conditions that may affect the outcome. The discussion does not reach a consensus on the best approach or the implications of the proposed methods.
Contextual Notes
Limitations include the dependency on fabrication processes and the fixed nature of boron doses in standard IC processes, which may restrict the ability to adjust Vth without explicit instructions to the fabrication labs.