公开(公告)号：US20140140380A1

公开(公告)日：2014-05-22

申请号：US13683826

申请日：2012-11-21

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Nirmal C. Warke ,  Bradley Kramer ,  Robert F. Kramer

IPC: H04L7/10

CPC classification number: H04L7/10 ,  H04L27/34

Abstract: A method is provided. An initial bit sequence is received by a receiver. A local oscillator is locked initially to a local reference and subsequently to the received signal using the initial bit sequence, and automatic gain control (AGC) is performed once the local oscillator is locked to the local reference. A Costas loop is then activated so as to achieve carrier frequency offset (CFO) lock, and sign inversion is detected. The receiver then synchronized with an end-of-training pattern.

Abstract translation: 提供了一种方法。 初始位序列由接收器接收。 本地振荡器最初被锁定到本地参考，然后使用初始位序列被锁定到接收到的信号，并且一旦本地振荡器被锁定到本地参考，就执行自动增益控制（AGC）。 然后激活科斯塔斯循环，以实现载波频率偏移（CFO）锁定，并且检测到符号反转。 接收器然后与训练结束模式同步。

公开(公告)号：US10763833B2

公开(公告)日：2020-09-01

申请号：US16235291

申请日：2018-12-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ernst Gerog Muellner ,  Tobias Fritz ,  Bradley Kramer ,  Swaminathan Sankaran ,  Baher Haroun ,  Ralf Brederlow

IPC: H03K3/03 ,  H03K3/014

Abstract: In described examples, a ring oscillator includes a series of N stages in a first ring. Each stage includes a respective output terminal coupled to a respective input terminal of a next one of the stages in the first ring. N is a positive odd-numbered integer of at least three. A series of N level shifters in a second ring are respectively connected to the N stages. Each level shifter receives a respective clock output from a respective output terminal of a stage to which it is connected and generates a respective boosted clock output in response thereto. The boosted clock output is coupled to control an impedance state of a next one of the level shifters in the second ring.