Oscillation circuit, electronic circuit using the same, and semiconductor device, electronic equipment, and timepiece using the same

An oscillation circuit comprising:

• an inverting amplifier including a first semiconductor switching element and a second semiconductor switching element, said first and second semiconductor switching elements being prevented from being on simultaneously to limit a short-circuiting current flowing through said inverting amplifier when said oscillation circuit is driven;
• and
• a bias circuit for applying a first direct current bias voltage and a second direct current bias voltage to gates of said first semiconductor switching element and said second semiconductor switching element, respectively;
• said first and second direct current bias voltages shifting values of the direct current potentials of feedback inputs that are input from said inverting amplifier to said gates of said first and second semiconductor switching elements, to prevent said first and second semiconductor switching elements from being on simultaneously;
• and
• a source of constant current being connected in parallel to at least one of said first and second semiconductor switching elements, wherein a shortage of power necessary for stabilizing oscillation is offset by power from said source.

An oscillation circuit comprising:

• an inverting amplifier including a first semiconductor switching element and a second semiconductor switching element, said first and second semiconductor switching elements being prevented from being on simultaneously to limit a short-circuiting current flowing through said inverting amplifier when said oscillation circuit is driven;
• and
• a bias circuit for applying a first direct current bias voltage and a second direct current bias voltage to gates of said first semiconductor switching element and said second semiconductor switching element, respectively;
• said first and second direct current bias voltages shifting values of the direct current potentials of feedback inputs that are input from said inverting amplifier to said gates of said first and second semiconductor switching elements, to prevent said first and second semiconductor switching elements from being on simultaneously;
• and
• constant current sources being connected in parallel to at least one of said first and second semiconductor switching elements, each constant current source supplying a different constant current, and a selection circuit for selecting a constant current source from said constant current sources, wherein a shortage of power necessary for stabilizing oscillation is offset by power from said selected source.