Duty-cycle correction circuit
First Claim
1. An apparatus comprising:
- a first delay device for delaying a clock signal in response to a first control signal, thereby producing a delayed clock signal;
a first control signal generator configured to generate the first control signal on the basis of the clock signal and the delayed clock signal;
a second delay device for delaying a complementary clock signal in response to a second control signal, thereby producing a delayed complementary clock signal; and
a second control signal generator for generating the second control signal on the basis of the delayed clock signal and the delayed complementary clock signal, the second control signal generator being configured to cause the delayed clock signal and the delayed complementary clock signal to have a steady-state condition in which mutually corresponding edges thereof are separated by a pre-determined spacing.
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Accused Products
Abstract
An apparatus for generating two signals having a predetermined spacing between mutually corresponding signal edges includes first and second delay devices for delaying a clock signal and a complementary clock signal in response to respective first and second control signals. A first control signal generator generates the first control signal on the basis of the clock signal and the delayed clock signal. A second control signal generator generates the second control signal on the basis of the delayed clock signal and the delayed complementary clock signal. The second control signal generator causes the delayed clock signal and the delayed complementary clock signal to have a steady-state condition in which mutually corresponding edges thereof are separated by a pre-determined spacing.
32 Citations
21 Claims
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1. An apparatus comprising:
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a first delay device for delaying a clock signal in response to a first control signal, thereby producing a delayed clock signal;
a first control signal generator configured to generate the first control signal on the basis of the clock signal and the delayed clock signal;
a second delay device for delaying a complementary clock signal in response to a second control signal, thereby producing a delayed complementary clock signal; and
a second control signal generator for generating the second control signal on the basis of the delayed clock signal and the delayed complementary clock signal, the second control signal generator being configured to cause the delayed clock signal and the delayed complementary clock signal to have a steady-state condition in which mutually corresponding edges thereof are separated by a pre-determined spacing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method comprising:
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delaying a clock signal in response to a first control signal, thereby generating a delayed clock signal therefrom;
generating a first control signal on the basis of the clock signal and the delayed clock signal;
delaying a complementary clock signal in response to a second control signal, thereby generating a delayed complementary clock signal therefrom;
generating a second control signal on the basis of the delayed clock signal and the delayed complementary clock signal, the second control signal being selected to cause the delayed clock signal and the delayed complementary clock signal to have a steady-state condition in which mutually corresponding edges thereof are separated by a pre-determined spacing. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. An apparatus for generating a first signal and a second signal separated from the first signal by a selected interval, the apparatus comprising:
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a first delay device for delaying a clock signal by an interval controlled by a first control signal, thereby producing a delayed clock signal;
a second delay device for delaying a complementary clock signal by an interval controlled by a second control signal, thereby producing a delayed complementary clock signal;
a first control signal generator disposed to receive the clock signal and the delayed clock signal, the first control signal generator being configured to generate the first control signal on the basis of a phase difference between the clock signal and the delayed clock signal;
a second control signal generator disposed to receive the delayed clock signal and the delayed complementary clock signal, the second control signal generator including means for generating the second control signal on the basis of a phase difference between the delayed clock signal and the delayed complementary clock signal.
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Specification