Circuit Fundamentals — question 7 of 10
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You designed a single-pole RC low-pass filter and expected a roll-off of -20dB/decade past its corner frequency. When you sweep a sine wave through it and measure the response, you instead see -40dB/decade roll-off, and the corner frequency is noticeably lower than your calculated value. What does this tell you about the actual circuit, and what would you check first?