US 12,348,229 B2
Continuous phase maintenance for switched frequencies using phase accumulators
Marc Almendros, Barcelona (ES); Gidget A. Heintz, Fort Collins, CO (US); and John H. Guilford, Stanwood, WA (US)
Assigned to KEYSIGHT TECHNOLOGIES, INC., Santa Rosa, CA (US)
Filed by Keysight Technologies, Inc., Santa Rosa, CA (US)
Filed on Mar. 10, 2023, as Appl. No. 18/120,273.
Prior Publication US 2024/0305281 A1, Sep. 12, 2024
Int. Cl. H03K 5/01 (2006.01); H03K 5/00 (2006.01)
CPC H03K 5/01 (2013.01) [H03K 2005/00286 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An integrated phase accumulator apparatus, comprising:
a first phase accumulator configured to accumulate a first phase increment over time determined by a phase increment calculator, and provide a first accumulated phase value for signal generation via a local oscillator at a first frequency;
a second phase accumulator configured to accumulate a second phase increment over time determined by said phase increment calculator, and provide a second accumulated phase value for signal generation via the local oscillator at a second frequency; and
a switch configured to switch the integrated phase accumulation apparatus between the first frequency and the second frequency and between the second frequency and the first frequency so as to maintain a first continuous phase for the first frequency and a second continuous phase for the second frequency.