公开(公告)号：US20170155397A1

公开(公告)日：2017-06-01

申请号：US15430182

申请日：2017-02-10

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Arun Paidimarri ,  Danielle Griffith ,  Alice Wang

IPC: H03L7/24 ,  H03B5/32 ,  H03B5/24

CPC classification number: H03L7/24 ,  H03B1/00 ,  H03B5/20 ,  H03B5/24 ,  H03B5/26 ,  H03B5/32 ,  H03B2200/0082 ,  H03L7/0802

Abstract: Systems and methods of low power docking of sleep mode radios are disclosed herein. In an example embodiment, a crystal oscillator is purposefully mistuned to achieve lower power consumption, and then synchronized using a high frequency crystal oscillator. In an alternative embodiment, the input offset voltages of the comparator in an RC oscillator are cancelled, which allows low power operation and high accuracy performance when tuned to the high frequency crystal. A lower power comparator may be used with higher input offset voltages but still achieve higher accuracy. The RC circuit is switched back and forth on opposite phases of the output, cancelling the offset voltage on the inputs of the comparator.

公开(公告)号：US09853651B2

公开(公告)日：2017-12-26

申请号：US15430182

申请日：2017-02-10

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Arun Paidimarri ,  Danielle Griffith ,  Alice Wang

IPC: H03B5/20 ,  H03B5/32 ,  H03B1/00 ,  H03L7/24 ,  H03B5/24

CPC classification number: H03L7/24 ,  H03B1/00 ,  H03B5/20 ,  H03B5/24 ,  H03B5/26 ,  H03B5/32 ,  H03B2200/0082 ,  H03L7/0802

Abstract: Systems and methods of low power docking of sleep mode radios are disclosed herein. In an example embodiment, a crystal oscillator is purposefully mistuned to achieve lower power consumption, and then synchronized using a high frequency crystal oscillator. In an alternative embodiment, the input offset voltages of the comparator in an RC oscillator are cancelled, which allows low power operation and high accuracy performance when tuned to the high frequency crystal. A lower power comparator may be used with higher input offset voltages but still achieve higher accuracy. The RC circuit is switched back and forth on opposite phases of the output, cancelling the offset voltage on the inputs of the comparator.