Discussion Overview
The discussion revolves around increasing the output voltage from a photodiode, specifically addressing the challenge of interfacing a low voltage impulse (~200mV) with a circuit that requires a voltage of 1V or more. The conversation explores various solutions without relying on continuously powered components.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
- Experimental/applied
Main Points Raised
- One participant describes the need for a voltage increase from a photodiode output of ~200mV and suggests avoiding op-amps or other powered components.
- Another participant questions whether the 200mV is derived from passing the 50nA through a 4 MegOhm resistor and asks about the frequency and width of the pulses.
- A suggestion is made regarding the use of very low power op-amps, with a specific mention of Maxim's low supply current options.
- One participant proposes the idea of using a charge pump as a potential solution.
- Multiple participants recommend micro power op-amps as a viable option for the application.
Areas of Agreement / Disagreement
Participants express multiple competing views on how to achieve the desired voltage increase, with no consensus on a single solution. Suggestions range from using low power op-amps to charge pumps, indicating a variety of approaches being considered.
Contextual Notes
Participants have not fully explored the implications of their suggestions, such as the specific requirements of the application or the limitations of the proposed components. There is also uncertainty regarding the frequency and characteristics of the pulses from the photodiode.
Who May Find This Useful
Individuals interested in interfacing low voltage photodiode outputs with circuits, particularly those looking for low power solutions in electronic design.
