Cadence Ams Design India Private Limited

Jyoti Arya

Prasenjit Bhowmik

Rishi Mathur

The main feedback loop of a PLL/DLL receives a reference clock and an output clock as inputs, and operates to achieve one or both of a phase and a frequency lock of the output clock with respect to the reference clock. The PLL/DLL includes an RS-latch connected to receive the output clock and the reference clock. The RS-Latch generates a digital output representing a phase difference between the reference clock and the output clock. A correction block in the PLL/DLL receives the digital output and adjusts an electrical characteristic of the main feedback loop by a value that is based on a polarity of the digital output. Effects of offset-errors in the PLL/DLL are thereby minimized or corrected for.

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Pilan, India

Jyoti Arya