High oversampling ratio dynamic element matching scheme for high dynamic range digital to RF data conversion for cellular communications

US9537514B2 · kind B2 · utility

Assignee

• GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

• Timothy J. Talty · Beverly Hills, US
• Zhiwei Xu · Sunnyvale, US
• Mohiuddin Ahmed · Moorpark, US
• Cynthia D. Baringer · Piedmont, US
• Albert E. Cosand · Craydon Court, US
• James Chingwei Li · Simi Valley, US
• Yen-Cheng Kuan · Provo, US
• Peter Petre · Oak Park, US

Key dates

• Filing date: Jun 19, 2015
• Grant date: Jan 3, 2017
• Expiry date: Jun 19, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03M3/502
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

An RF transmitter module for a cellular radio that includes a delta-sigma modulator having a plurality of interleaving dynamic element matching (DEM) circuits providing interleaved digital bits at a reduced clock rate. An interleaver controller controls the DEM circuits so as to provide groups of the digital bits at different points in time. In one embodiment, a summation junction adds the groups of the digital bits to provide a continuous stream of the interleaved digital bits, a DAC converts the stream of interleaved digital bits to an analog signal, and a power amplifier amplifies the analog signal.