Stabilized DC power supply circuit having a current limiting circuit and a correction circuit

A stabilized DC power supply circuit equipped with an output transistor between an input terminal and an output terminal, comprising:

• an output current limiting circuit for limiting an output current of the output transistor;
• and
• a correction circuit for correcting variation in restriction of the output current caused by variation in relationship between a physical quantity at a control electrode of the output transistor and the output current of the output transistor, wherein
• the correction circuit includes a correcting transistor that is manufactured through the same manufacturing process as that for the output transistor and formed so as to have the same tendency of variation of the manufacturing process of the relationship as that of the output transistor and uses the correcting transistor to thereby correct variation in restriction of the output current of the output transistor caused by variation of the relationship.

A stabilized DC power supply circuit equipped with an output transistor between an input terminal and an output terminal, comprising:

• an output current limiting circuit for limiting an output current of the output transistor;
• and
• a correction circuit for correcting variation in restriction of the output current caused by variation in relationship between a physical quantity at a control electrode of the output transistor and the output current of the output transistor, wherein
• the output transistor is a bipolar transistor,
• the relationship between the physical quantity at the control electrode and the output current is current amplification factor, and
• the correction circuit includes a correcting transistor that is manufactured through the same manufacturing process as that for the output transistor and formed so that a current amplification factor of its own may also increase as a current amplification factor of the output transistor increases due to variation of the manufacturing process and uses the correcting transistor to thereby correct variation in restriction of the output current of the output transistor caused by variation in the current amplification factor of the output transistor.

A stabilized DC power supply circuit equipped with an output transistor between an input terminal and an output terminal, comprising:

• an output current limiting circuit for limiting an output current of the output transistor;
• and
• a correction circuit for correcting variation in restriction of the output current caused by variation in relationship between a physical quantity at a control electrode of the output transistor and the output current of the output transistor, wherein
• the output transistor is a field effect transistor,
• the relationship between the physical quantity at the control electrode and the output current is mutual conductance, and
• the correction circuit includes a correcting transistor that is manufactured through the same manufacturing process as that for the output transistor and formed so that a mutual conductance of its own may also increase as a mutual conductance of the output transistor increases due to variation of the manufacturing process and uses the correcting transistor to thereby correct variation in restriction of the output current of the output transistor caused by variation in the mutual conductance of the output transistor.

A stabilized DC power supply circuit equipped with an output transistor between an input terminal and an output terminal, comprising:

• an output current limiting circuit for limiting an output current of the output transistor;
• and
• a correction circuit for correcting variation in restriction of the output current caused by variation in relationship between a physical quantity at a control electrode of the output transistor and the output current of the output transistor, wherein
• the output transistor is a bipolar transistor,
• the relationship between the physical quantity at the control electrode and the output current is current amplification factor, and
• the output current limiting circuit limits the output current of the output transistor based on a detecting current which is a base current of the output transistor.

A stabilized DC power supply circuit equipped with an output transistor between an input terminal and an output terminal, comprising:

• an output current limiting circuit for limiting an output current of the output transistor;
• and
• a correction circuit for correcting variation in restriction of the output current caused by variation in relationship between a physical quantity at a control electrode of the output transistor and the output current of the output transistor, wherein
• the output transistor is a field effect transistor,
• the relationship between the physical quantity at the control electrode and the output current is mutual conductance, and
• the output current limiting circuit limits the output current of the output transistor based on a detecting current that reflects the output current of the output transistor and a mutual conductance of the output transistor.