Unlock instant, AI-driven research and patent intelligence for your innovation.

Harmonic suppressing local oscillator signal generation

A local oscillator and harmonic technology, applied in the field of radio frequency transceivers, can solve problems such as signal interference

Active Publication Date: 2021-07-09
APPLE INC
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although carrier aggregation greatly increases the rate at which data can be transmitted wirelessly, CA operation means that multiple received signals with different frequencies are down-converted by the device, while the transmitted signal is up-converted to different frequencies, resulting in possible gaps between the signals. interference

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Harmonic suppressing local oscillator signal generation
  • Harmonic suppressing local oscillator signal generation
  • Harmonic suppressing local oscillator signal generation

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0070] Example 1 is a transceiver comprising: a local oscillator (LO) signal circuit configured to output an LO signal having an LO frequency. The LO signal circuit includes: a selection circuit configured to select a pulse pattern and a gap duration based at least on a target harmonic of the LO frequency to be suppressed; and a generation circuit configured to generate An LO signal characterized by ; a mixer circuit configured to take as input the LO signal and an information signal encoding communication data, and output an offset signal corresponding to the information signal offset to a desired frequency.

example 2

[0071] Example 2 includes the subject matter of Example 1, including or omitting the optional element, wherein the pulse pattern includes two pulses occurring during a single period of the LO signal, further wherein the two pulses are separated by a gap having a gap duration.

example 3

[0072] Example 3 includes the subject matter of Example 1, including or omitting optional elements, wherein the LO signal circuit is configured to generate four LO signal components, wherein each LO signal component is characterized by a selected pulse pattern and gap duration, wherein each The LO signal component has a 25% duty cycle.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A transceiver includes a local oscillator (LO) signal circuit and a mixer circuit. The LO signal circuit is configured to output an LO signal having an LO frequency, comprising: a selection circuit configured to determine a target harmonic of the transceiver; and a generation circuit configured to generate an LO signal adapted to suppress the target harmonics. The mixer circuit is configured to input an LO signal and an information signal encoding the transmitted data, and to output a signal corresponding to the information signal shifted to a desired frequency.

Description

[0001] Divisional statement [0002] This disclosure is a divisional application of a Chinese invention patent application with an application date of May 22, 2017, an invention titled "Harmonic Suppression Local Oscillator Signal Generation", and an application number: 201780030844.2. [0003] References to related applications [0004] This application claims priority to US Application No. 15 / 188,267, filed June 21, 2016, which is incorporated by reference in its entirety. technical field [0005] The present disclosure relates to the field of radio frequency (RF) transceivers, and, more particularly, to methods and apparatus for suppressing unwanted harmonics generated by mixer circuits in RF front-ends. Background technique [0006] Carrier aggregation (CA) is becoming more and more common in wireless communications. A user equipment (UE) device that supports CA operations includes multiple receivers and / or multiple transmitters. In carrier aggregation, data is receiv...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/40H04B1/403
CPCH04B1/40H04B1/403H04B15/06H03D7/1441
Inventor A·格布哈特S·萨吉纳K·迪弗雷纳S·泰尔蒂尼克
Owner APPLE INC