Why a sine wave output of a voltage regulator?
Why a sine wave output of a voltage regulator?
(OP)
I was in the lab today working on a circuit and it wasn't behaving as I expected. I diagnosed the problem as an irregular supply voltage from a 7805 voltage regulator. I am supplying it with 15 volts (also tried 12 volts) and getting 5 volts out. When the resistance of the circuit is low enough (does not have to be very low, 660 ohms for example) I start to get a sine wave along with the DC voltage. I realize that the regulator may start behaving irregularaly at higher current draws (lower resistances) but I am talking about milliamps. Any ideas?
Thanks,
Steven
Thanks,
Steven





RE: Why a sine wave output of a voltage regulator?
RE: Why a sine wave output of a voltage regulator?
RE: Why a sine wave output of a voltage regulator?
http://www.national.com/ds/LM/LM7512C.pdf
states that no external components are required.
RE: Why a sine wave output of a voltage regulator?
RE: Why a sine wave output of a voltage regulator?