Hi,
I'm trying to drive a transformer with an NE555 circuit. The output voltage of the NE555 circuit appears to be lower than expected. The output signal about 58kHz, ~8V p-p and not quite but close to 50% duty cycle. It is said here and there on the web that the maximum output voltage is around 1.5V lower than the rail voltage. Is that in the datasheet(Texas Instruments part)? I couldn't find it.
Should I doubt the measurement or the part? I bought an old scope some time ago and have no idea when it was last calibrated, it reads the output as slightly less than 8V p-p. The manual of my true RMS DMM specifies RMS voltage only up to 10kHz. At 58kHz it reads the output as 8.5V RMS. I'm guessing that at high frequencies you get the peak voltage instead of the RMS value, or perhaps a nonsense reading.
What would you expect the p-p output voltage to be?
I'm trying to drive a transformer with an NE555 circuit. The output voltage of the NE555 circuit appears to be lower than expected. The output signal about 58kHz, ~8V p-p and not quite but close to 50% duty cycle. It is said here and there on the web that the maximum output voltage is around 1.5V lower than the rail voltage. Is that in the datasheet(Texas Instruments part)? I couldn't find it.
Should I doubt the measurement or the part? I bought an old scope some time ago and have no idea when it was last calibrated, it reads the output as slightly less than 8V p-p. The manual of my true RMS DMM specifies RMS voltage only up to 10kHz. At 58kHz it reads the output as 8.5V RMS. I'm guessing that at high frequencies you get the peak voltage instead of the RMS value, or perhaps a nonsense reading.
What would you expect the p-p output voltage to be?
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