Synthesizer—power amplifier interface in a wireless circuit

US10256854B1 · kind B1 · utility

Assignee

• Silicon Laboratories Inc. · US

Inventors

• Rangakrishnan Srinivasan · Austin, US
• Sriharsha Vasadi · Austin, US
• Zhongda Wang · Sunnyvale, US
• Mustafa H. Koroglu · Austin, US
• John M. Khoury · New Providence, US
• Aslamali A. Rafi · Austin, US
• Michael S. Johnson · Austin, US
• Francesco Barale · Fresno Street, US
• Sherry X. Wu · Austin, US

Key dates

• Filing date: Jan 19, 2018
• Grant date: Apr 9, 2019
• Expiry date: Jan 19, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03K19/018521
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

In an embodiment, an apparatus includes: a transmit circuit to upconvert a baseband signal to a first differential radio frequency (RF) signal, the transmit circuit to convert the first differential RF signal to a first single-ended RF signal; a duty cycle correction circuit coupled to the transmit circuit to receive the first single-ended RF signal and compensate for a duty cycle variation in the first single-ended RF signal to output a duty cycle-corrected RF signal; a conversion circuit to convert the duty cycle-corrected RF signal to a second differential RF signal; and an interface circuit to transfer the second differential RF signal from a first ground domain to a second ground domain.