Invention Grant
- Patent Title: Low intermediate frequency transmitter
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Application No.: US17462145Application Date: 2021-08-31
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Publication No.: US11533068B1Publication Date: 2022-12-20
- Inventor: Rahul Sharma , Karthikeyan Gunasekaran , Sarma Sundareswara Gunturi , Ram Narayan Krishna Nama Mony , Jaiganesh Balakrishnan , Sandeep Kesrimal Oswal , Visvesvaraya Pentakota
- Applicant: Texas Instruments Incorporated
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent John R. Pessetto; Frank D. Cimino
- Main IPC: H04L5/12
- IPC: H04L5/12 ; H04L23/02 ; H04B1/00 ; H04B1/30

Abstract:
A radio frequency transmitter includes an upconverter that outputs in-phase (I) and quadrature (Q) signals, a digital timing offset circuit, first and second digital-to-analog converters (DACs), an analog timing offset removal circuit, first and second pulse shapers, and an adder. The digital timing offset circuit introduces a time offset between the I and Q signals. The first and second DACs output analog I and Q signals, respectively, and have first and second clock signals, respectively. The first and second clock signals have the same frequency and are offset relative to each other by the time offset. The analog timing offset removal circuit removes the time offset between the analog I and Q signals. The first and second pulse shapers receive the analog I and Q signals, respectively, and output pulse-shaped I and Q signals. The adder receives the pulse-shaped I and Q signals and outputs an intermediate frequency signal.
Information query