IP Library Granted Patent US 7,652,506
Granted Patent B2
US 7,652,506 · App. 11/723,660 · Granted Jan 26, 2010

Complementary signal generating circuit

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Quick Facts
Patent No.
US 7,652,506
App. No.
11/723,660
Granted
Jan 26, 2010
Kind
B2
Abstract

A complementary signal generating circuit according to an embodiment of the present invention includes: an inverting element inverting a first signal to generate a second signal; a first transistor connecting a first power supply potential and a first output terminal electrically in accordance with the first signal; a second transistor connecting the first output terminal and a second power supply potential electrically in accordance with the second signal; a third transistor connecting the first power supply potential and a second output terminal electrically in accordance with the second signal; and a fourth transistor connecting the second output terminal and the second power supply potential electrically in accordance with the first signal.

Claims (50)

1. A complementary signal generating circuit, comprising:

an inverting element inverting a first signal to generate a second signal;

a first transistor connecting a first power supply potential and a first output terminal electrically in accordance with the first signal;

a second transistor connecting the first output terminal and a second power supply potential electrically in accordance with the second signal;

a third transistor connecting the first power supply potential and a second output terminal electrically in accordance with the second signal; and

a fourth transistor connecting the second output terminal and the second power supply potential electrically in accordance with the first signal,

wherein a delay of a rising waveform from the first output terminal against the first signal and a delay of a falling waveform from the second output terminal against the first signal are set substantially the same, and

a delay of a falling waveform from the first output terminal against the second signal and a delay of a rising waveform from the second output terminal against the second signal are set substantially the same.

2. The complementary signal generating circuit according to claim 1 , wherein the first to forth transistors have a same conductivity type.

3. The complementary signal generating circuit according to claim 2 , wherein the first to fourth transistors comprise N-channel type MOS transistors.

4. The complementary signal generating circuit according to claim 1 , wherein the first and third transistors comprise depletion type transistors.

5. The complementary signal generating circuit according to claim 1 , further comprising:

a fifth transistor connected in parallel with the first transistor and connecting the first power supply potential and the first output terminal electrically in accordance with the second signal; and

a sixth transistor connected in parallel with the third transistor and connecting the first power supply potential and the second output terminal electrically in accordance with a third signal obtained by inverting the second signal.

6. The complementary signal generating circuit according to claim 5 , wherein the first and fifth transistors constitute a first transfer gate, and

the third and sixth transistors constitute a second transfer gate.

7. The complementary signal generating circuit according to claim 1 , wherein the first and third transistors have substantially a same size, and

the second and fourth transistors have substantially a same size.

8. The complementary signal generating circuit according to claim 1 , wherein a first signal output from the first output terminal is in phase with the first signal, and a second signal output from the second output terminal is in reverse phase with the first signal.

9. A complementary signal generating circuit, comprising:

a first transistor where a first terminal is connected with a first power supply potential, a second terminal is connected with a first output terminal, and a signal input to an inverting element is supplied to a control terminal of said first transistor;

a second transistor where a first terminal is connected with the first output terminal, a second terminal is connected with a second power supply potential, and an inverted signal output from the inverting element is input to a control terminal of said second transistor;

a third transistor where a first terminal is connected with the first power supply potential, a second output terminal is connected with a second terminal, and the inverted signal output from the inverting element is input to a control terminal of said third transistor; and

a fourth transistor where a first terminal is connected with the second output terminal, a second terminal is connected with the second power supply potential, and the signal input to the inverting element is supplied to a control terminal of said fourth transistor,

wherein a delay of a rising waveform from the first output terminal against the signal input and a delay of a falling waveform from the second output terminal against the signal input are set substantially the same, and

a delay of a falling waveform from the first output terminal against the inverted signal and a delay of a rising waveform from the second output terminal against the inverted signal are set substantially the same.

10. The complementary signal generating circuit according to claim 9 , wherein

the first to fourth transistors comprise N-channel type MOS transistors, and

the first terminal of each of said first to fourth transistors comprises a drain terminal and the second terminal of each of said first to fourth transistors comprises a source terminal.

11. The complementary signal generating circuit according to claim 9 , further comprising:

a fifth transistor where a first terminal is connected with the first power supply potential, a second terminal is connected with the first output terminal, and the signal output from the inverting element is input to a control terminal of said fifth transistor; and

a sixth transistor where a first terminal is connected with the second power supply potential, a second terminal is connected with the second output terminal, and a signal obtained by inverting the inverted signal output from the inverting element is input to a control terminal of said sixth transistor.

12. The complementary signal generating circuit according to claim 9 , wherein the first and third transistors comprise depletion type transistors.

13. The complementary signal generating circuit according to claim 9 , wherein

the first and third transistors have substantially a same size, and

the second and fourth transistors have substantially a same size.

14. The complementary signal generating circuit according to claim 8 , wherein a rising and a falling of said first output signal coincide without a delay with a falling and a rising, respectively, of said second output signal.

15. The complementary signal generating circuit according to claim 8 , wherein a rising and a falling of said first output signal comprise different durations from each other.

16. A complementary signal generating circuit, comprising:

a first input signal;

a second input signal substantially inverted to said first input signal;

a first transistor connecting a first power supply potential and a first output terminal electrically in accordance with the first input signal;

a second transistor connecting the first output terminal and a second power supply potential electrically in accordance with the second input signal;

a third transistor connecting the first power supply potential and a second output terminal electrically in accordance with the second input signal; and

a fourth transistor connecting the second output terminal and the second power supply potential electrically in accordance with the first input signal,

wherein a delay of a rising waveform from the first output terminal against the first signal and a delay of a falling waveform from the second output terminal against the first signal are set substantially the same, and

a delay of a falling waveform from the first output terminal against the second signal and a delay of a rising waveform from the second output terminal against the second signal are set substantially the same.

17. The complementary signal generating circuit according to claim 16 , wherein:

said second input signal begins rising from a logic low level to a logic high level less than one half clock cycle after said first input signal begins falling from a logic high level to a logic low level, and

said second input signal begins falling from a logic high level to a logic low level less than one half clock cycle after said first input signal begins rising from a logic low level to a logic high level.

Assignments (2)
CHANGE OF NAME Recorded Nov 4, 2010
From: NEC ELECTRONICS CORPORATION
To: RENESAS ELECTRONICS CORPORATION
Reel/Frame 025311/0860 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 21, 2007
From: AOKI, MIKIO
To: NEC ELECTRONICS CORPORATION
Reel/Frame 019155/0005 →