公开(公告)号：US20200343856A1

公开(公告)日：2020-10-29

申请号：US16575410

申请日：2019-09-19

Applicant: GOODIX TECHNOLOGY INC.

Inventor： Mohamed ABOUDINA ,  Ahmed EMIRA ,  Amr Abuellil

IPC: H03B5/04 ,  H03L7/099 ,  H03L1/02

Abstract: Techniques are described for post-compensation of frequency drift due to changes in crystal oscillator temperature during operation. For example, a clock system is coupled with a crystal oscillator, and can use a reference clock signal from the crystal oscillator to generate an output clock signal using a clock generator. The clock system can monitor an electrical characteristic of a thermal component integrated with the oscillator, which it can map deterministically to a thermal value indicating a temperature of a crystal component of the oscillator. The clock system can then map the temperature deterministically to a frequency shift of the oscillator away from a nominal value. The clock system can then generate a post-compensation signal that directs the clock generator to shift the frequency of the clock output signal so as to compensate for at least a portion of the frequency drift.

公开(公告)号：US20210234736A1

公开(公告)日：2021-07-29

申请号：US16749994

申请日：2020-01-23

Applicant: GOODIX TECHNOLOGY INC.

Inventor： Mohamed ABOUDINA ,  Ahmed EMIRA ,  Esmail BABAKRPUR NALOUSI

IPC: H04L27/14 ,  H04B1/16 ,  H04B1/12 ,  H03F3/19 ,  H03G3/30

Abstract: A receiver circuit is disclosed. The receiver circuit includes an amplifier having an input terminal, where the amplifier is configured to generate an RF signal based on a signal received at the input terminal, where the RF signal includes an information signal and a blocker signal modulating an RF carrier frequency. The receiver circuit also includes a mixer configured to receive the RF signal and to downconvert the RF signal to generate a baseband signal, where the baseband signal includes the information signal and the blocker signal modulating a baseband carrier frequency, where the baseband carrier frequency is less than the RF carrier frequency, and where the mixer is further configured to selectively attenuate the blocker signal.