Propagation delay adjustment circuit
First Claim
1. A circuit arrangement for delaying both a rising edge and a falling edge of an input signal including:
- a dual polarity output buffer for generating a first signal and a second signal, the first signal being a substantial replica of the input signal and the second signal being a substantial inversion of the input signal;
a first delay circuit interconnected to the dual polarity output buffer for causing a first time delay in the rising edge of the first signal;
a second delay circuit interconnected to the dual polarity output buffer for causing a second time delay in the rising edge of the second signal; and
a recombination circuit interconnected to both the first delay circuit and the second delay circuit and which combines an output of the first delay circuit and an output of the second delay circuit to generate a composite output signal representing the input signal with both the rising edge thereof and the falling edge thereof delayed.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed is a method and apparatus for variably and independently delaying the rising and falling edges of a digital waveform including a dual polarity output buffer, a first delay circuit, a second delay circuit and a recombination circuit. The dual polarity output buffer outputs a first signal that is a substantial replica of the input signal and a second signal that is an inversion of the input signal. The first delay circuit is connected to the dual polarity output buffer and generates a first time delay in the rising edges of the first, non-inverted signal. The second delay circuit is also connected to the dual polarity output buffer and generates a second time delay in the rising edges of the second, inverted signal. The recombination circuit is connected to both the first delay circuit and the second delay circuit and combines the outputs thereof to generate a composite output signal representing the input signal with both the rising edges thereof and the falling edges thereof delayed independently.
42 Citations
19 Claims
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1. A circuit arrangement for delaying both a rising edge and a falling edge of an input signal including:
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a dual polarity output buffer for generating a first signal and a second signal, the first signal being a substantial replica of the input signal and the second signal being a substantial inversion of the input signal;
a first delay circuit interconnected to the dual polarity output buffer for causing a first time delay in the rising edge of the first signal;
a second delay circuit interconnected to the dual polarity output buffer for causing a second time delay in the rising edge of the second signal; and
a recombination circuit interconnected to both the first delay circuit and the second delay circuit and which combines an output of the first delay circuit and an output of the second delay circuit to generate a composite output signal representing the input signal with both the rising edge thereof and the falling edge thereof delayed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of generating a signal having a delayed rising edge and a delayed falling edge with respect to an input signal including:
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inverting the input signal to create an inverted signal delaying a rising edge of the input signal by driving a first delay circuit with the input signal;
delaying a rising edge of the inverted signal by driving a second delay circuit with the inverted signal; and
combining an output of the first delay circuit and an output of the second delay circuit to generate a composite signal representing the input signal with both the rising edge and the falling edge delayed. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification