## Frequency sweep of a simple passive filter (200Hz to 2KHz)

 Hi, I am new to this site. I did a frequency sweep using input signal 20KHz sine wave of 1V and the result is somehow puzzling. Here are my questions. 1. Freq and V plot, the Y axis shows total of 5 volts with each of 1 volt. Why total of 5V as my input signal is only 1V sine wave? 2. Freq and dBV plot, the Y axis uses pdBV. What is pdBV? 3. In freq and dBV plot it shows -40pdBV at 200 Hz. I did ask a friend to do the analysis on a Cadence software and the result if -5.4dBV at 200Hz. A huge difference here, and I want to find out if I did anything wrong. Thanks in advance. David by ddkuo October 12, 2020 Hi @ddkuo, Can you post a link to the public circuit that you are working on? It will help everyone understand your question a bit better. by hevans October 12, 2020 Add comment... Please sign in or create an account to comment.

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