A constant voltage generator is comprised of a band gap reference circuit,
a current supply circuit, a starting circuit and a voltage-current
conversion circuit, and the starting circuit is further comprised of a
first and second load elements, a first transistor which is connected to
the first load element, a second transistor of which current capability
is larger than the first transistor and which shares the voltage of the
base with the first transistor and is connected to the second load
element, a first resistor which is connected to the first transistor, and
a second resistor which is connected to the second transistor, and the
output of the voltage-current conversion circuit is input to the
connection point between the second transistor and the second resistor,
and the current at the connection point between the second load element
and the second transistor controls the current supply circuit.