yonghui WROTE:hi,
the pair of BJT junction is used as Bandgap voltage reference in analog design, which compensate for the temperature changes in surroundings to keep the output voltage fixed. but the changes of the VBE of BJT, i think is non linear.
the Opamp is used as the amplifier in this circuit. op amp can be used as inverting and non inverting depends on how the input is biased. so mayb u can search how opamp is biased to be inverting and non inverting circuit.
yh
hi,
are there any IC/circuit could make the voltage's increasing/decreasing to become "invert" ?
ex:
my initial voltage is 5V, i increase it to 9V(5v to 9v,
increase 4v)
so i want the "special iC/circuit"output aslo initial voltage is 5V but decrease to 1V(5v decrease to 1v,
decrease 4v)
any speacial ic can do that
i'm poor in english and just an electronic hobbyist.