A
Abbie
Guest
Hello all,
I have some question about a 15V 3A variable voltage/current
power supply circuit. Firstly, the op-amps in the circuit have
a negative feedback capacitor. Does this mean, since power
supplies are dc, that these op-amps will actually be comparators
and not amplifiers. The other question is this: There are two
different power sources, one is the main one, which is to be
regulated, and the other is from another set of windings on the
same transformer, which are regulated with zener diodes and
a fixed voltage regulator, and are used to power up the op
amps and the controlling circuit. The funny thing is that the GND
of this other source seems to be connected to the plus of the
regulated output of the supply, does this sound o.k. ?
I have some question about a 15V 3A variable voltage/current
power supply circuit. Firstly, the op-amps in the circuit have
a negative feedback capacitor. Does this mean, since power
supplies are dc, that these op-amps will actually be comparators
and not amplifiers. The other question is this: There are two
different power sources, one is the main one, which is to be
regulated, and the other is from another set of windings on the
same transformer, which are regulated with zener diodes and
a fixed voltage regulator, and are used to power up the op
amps and the controlling circuit. The funny thing is that the GND
of this other source seems to be connected to the plus of the
regulated output of the supply, does this sound o.k. ?