Patent ID: 7102336

Claim:
A voltage regulator circuit comprising: a regulator circuit; and a short-circuit protection circuit, wherein said regulator circuit includes: a first transistor, and a first amplifier which outputs a gate voltage to a gate of said first transistor in response to an input of a reference potential and a feedback potential such that said feedback potential coincides with said reference potential, said feedback potential is an output potential of first transistor fed back to said first amplifier, said short-circuit protection circuit includes: a second transistor that said gate voltage is supplied to a gate, a first resistance which connects a first terminal of said second transistor with a ground, a second resistance which connects a second terminal of said second transistor with a power source, and a second amplifier which outputs a control voltage to said first amplifier in response to an input of a bias potential and a potential of said first terminal to control said gate voltage.