Delay circuit, voltage-controlled delay circuit, voltage-controlled oscillation circuit, delay adjustment circuit, DLL circuit, and PLL circuit

A delay circuit having a delay stage, wherein a delay time is determined by a supplied drive current, said delay stage comprising:

• a MOS type inverter;
• a first current source circuit for supplying a first drive current to said inverter in accordance with a first bias voltage;
• a second current source circuit for supplying a second drive current having a power source voltage dependency different from that of said first drive current to said inverter;
• a first adding means for adding a change of said power source voltage to said first bias voltage by a first ratio and supplying a result of the addition to said first current source circuit;
• and
• a second adding means for adding the change of said power source voltage to said second bias voltage by a second ratio and supplying a result of the addition to said second current source circuit.

A delay circuit comprised of a plurality of delay stages having different power source voltage dependency,

• said delay circuit comprising:
• first delay stages having a first power source voltage dependency and
• second delay stages having a second power source voltage dependency opposite to said first power source voltage dependency;
• numbers of said first delay stages and the second delay stages being determined by a predetermined ratio,
• wherein the ratio of said first delay stages and the second delay stages are determined within a delay time when jitter of said delay circuit is not more than a desired target value.

A voltage-controlled delay circuit having a delay stage, wherein a delay time is determined by supplied drive currents, said delay stage comprising:

• a MOS type inverter;
• a first current source circuit for supplying a first drive current to said inverter in accordance with a first control voltage;
• a second current source circuit for supplying a second drive current having a power source voltage dependency different from that of said first drive current to said inverter;
• a first adding means for adding a change of said power source voltage to said first control voltage by a first ratio and supplying a result of the addition to said first current source circuit;
• and
• a second adding means for adding the change of said power source voltage to said second control voltage by a second ratio and supplying a result of the addition to said second current source circuit.

A voltage-controlled delay circuit comprised of a plurality of delay stages having different power source voltage dependency, comprising:

• first delay stages having a delay time controlled in accordance with a control voltage and having a first power source voltage dependency and
• second delay stages having a delay time controlled in accordance with said control voltage and having a second power source voltage dependency opposite to said first power source voltage dependency;
• numbers of said first delay stages and the second delay stages being determined by a predetermined ratio,
• wherein the ratio of said first delay stages and the second delay stages is determined within a delay time when jitter of said voltage-controlled delay circuit is not more than a desired target value.

A control voltage oscillation circuit comprised of delay stages each having a delay time determined by supplied drive currents connected in a ring, wherein:

• said delay stage comprises:
• a MOS type inverter;
• a first current source circuit for supplying a first drive current to said inverter in accordance with a first control voltage;
• a second current source circuit for supplying a second drive current having a power source voltage dependency different from that of said first drive current to said inverter;
• a first adding means for adding a change of said power source voltage to said first control voltage by a first ratio and supplying a result of the addition to said first current source circuit;
• and
• a second adding means for adding a change of said power source voltage to said second control voltage by a second ratio and supplying a result of the addition to said second current source circuit.

A voltage-controlled oscillation circuit comprised of a plurality of delay stages each having a different power source voltage dependency connected in a ring, comprising:

• first delay stages having a delay time controlled in accordance with a control voltage and having a first power source voltage dependency and
• second delay stages having a delay time controlled in accordance with said control voltage and having a second power source voltage dependency opposite to said first power source voltage dependency;
• numbers of said first delay stages and the second delay stages being determined by a predetermined ratio,
• wherein the ratio of said first delay stages and the second delay stages is determined within a delay time when jitter of said voltage-controlled oscillation circuit is not more than a desired target value.