Clock distribution techniques for channels
First Claim
Patent Images
1. A circuit comprising:
- a first area;
a second area comprising a first locked loop circuit that generates a first clock signal, the first locked loop circuit receiving a supply voltage that is isolated from noise generated in the first area; and
a third area comprising multiple quads of channels and a clock line coupled to route at least one clock signal generated in the second area to the channels in each of the quads, wherein the third area is separate from the second area in the circuit.
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Abstract
A circuit includes a first area, a second area, and a third area. The second area includes a locked loop circuit that generates a clock signal. The locked loop circuit receives a supply voltage that is isolated from noise generated in the first area. The third area includes multiple quads of channels and a clock line coupled to route at least one clock signal generated in the second area to the channels in each of the quads. The third area is separate from the second area in the circuit.
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Citations
23 Claims
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1. A circuit comprising:
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a first area; a second area comprising a first locked loop circuit that generates a first clock signal, the first locked loop circuit receiving a supply voltage that is isolated from noise generated in the first area; and a third area comprising multiple quads of channels and a clock line coupled to route at least one clock signal generated in the second area to the channels in each of the quads, wherein the third area is separate from the second area in the circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An integrated circuit comprising:
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a first area; a second area comprising a first locked loop circuit that generates a first clock signal, and a second locked loop circuit that generates a second clock signal, the first and the second locked loop circuits receiving a supply voltage that is isolated from noise generated in the first area; and a third area comprising groups of channels and a clock line that comprises a first segment coupled to route the first clock signal to the channels in at least one of the groups, a second segment coupled to route the second clock signal to the channels in at least one of the groups, and a buffer coupled to the first and the second segments of the clock line that is configurable to isolate the first and the second segments from each other. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for routing clock signals to channels, the method comprising:
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generating a first clock signal in a first area of a circuit in response to a first input reference clock signal and a supply voltage that is isolated from noise generated in a second area of the circuit; generating a second clock signal in the first area of the circuit in response to a second input reference clock signal and the supply voltage; routing the first clock signal through a first segment of a clock line to channels in a first quad in a third area of the circuit; and routing the second clock signal through a second segment of the clock line to channels in a second quad in the third area. - View Dependent Claims (21, 22)
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23. A circuit comprising:
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means for generating a first clock signal in a first area of a circuit in response to a first input reference clock signal and a supply voltage that is isolated from noise generated in a second area of the circuit; means for generating a second clock signal in the first area of the circuit in response to a second input reference clock signal and the supply voltage; means for routing the first clock signal through a first segment of a clock line to channels in a first group of channels in a third area of the circuit; means for routing the second clock signal through a second segment of the clock line to channels in a second group of channels in the third area; and means for isolating the first segment of the clock line from the second segment of the clock line.
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Specification