Injection Locked Clock Multiplier with Embedded Phase Interpolator

Technology:; Injection Locked clock multiplier-cum-phase interpolator.

Industry & Application: Electronic System & Design Manufacturing (ESDM), ICT;

Market: The global market is projected to grow at a CAGR of 14.8% during 2023-2027.

Generally, phase interpolators are used to shift the output phase of a clock in a wide range of communication system wireline and wireless communication system. In this instance, the conventional system are unable to provide an effective solution to achieve low jitter and good PI resolution across the wide frequency range.
Further there are other issues related to requirement of circuitry related to multiphase high-frequency clock distribution, clock skewing circuit & etc.
Hence, there is a need to address the above issues in efficient manner.

The present invention describes an injection locked clock multiplier with embedded phase interpolator.
The subject invention comprises a wide range (2X) injection locked clock multiplier (ILCM) with an embedded phase interpolator (PI) multiplies a low-frequency clock to generate a high-frequency output.
The phase is shifted as desired during the clock generation itself with 2X frequency range & 1.5o -2o resolution.
Said ILCM-cum-PI realizes an intermediate output clock phase by digitally controlling delays for signals already present in a multiphase ring oscillator.

Technical Perspective:

Focused to generate an intermediate clock phase with high resolution within an oscillator by varying the delay units of the oscillator.
Provides a high frequency output inclusive of desired phase shift during the clock generation itself.
The ILCM retains the low output clock jitter across (340-550fsrms) and a good PI resolution (1.5o-2o) across the phase interpolation range by eliminating the multiphase high frequency clock distribution during phase interpolation.
Four stage pseudo differential ring oscillator used to generate intermediate clock phases.

Industrial Perspective:

It’s a cost-effective advanced system with power saving facility.
Applicable in communication system both wireline and wireless communication system.

Prof. Saurabh Saxena,

Department of Electrical Engineering

TRL-4

Proof of Concept ready, tested in lab.

Technology Transfer