An Injection Locking Scheme for Precision Quadrature Generation

Peter Kinget
Columbia University

Thursday, December 5, 2002
Hogan Room, 521 Cory
2 pm - 3:30

Abstract:

We describe a novel quadrature splitter based on injection locking a cascade of ring oscillators to a single phase reference clock. The output signals are in accurate quadrature with low phase noise over a wide bandwidth. This scheme operates at a high signal frequency and is inherently insensitive to the shape of the reference clock waveform. Experimental results at 2.7 GHz are reported for a prototype implementation in 0.25um BiCMOS technology. To prove the viability of this scheme, a single-sideband mixer was implemented along with the splitter. Over several chips, an average sideband supression of about 45dBc was obtained.

Based on a July 2002 JSSC paper by P. Kinget, R. Melville, D. Long, and V. Gopinathan. Was also presented at ESSCIRC 2001.