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Interference resistant local oscillator

A technology of mixers and regulators, used in power oscillators, inductors, fixed inductors, etc., to solve problems such as consumption, expensive solutions, multi-power and chip area

Active Publication Date: 2013-10-30
INTEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These circuits, along with the mixers for LO generation, also require large inductors, which consume more power and die area, and make the solution expensive

Method used

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Examples

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Embodiment Construction

[0015] In some embodiments, interference affecting local oscillators can be reduced by using the methods disclosed herein. These methods can be applied not only to low power transmitters, but also to medium to high power transmitters. With some embodiments, the VCO (Voltage Controlled Oscillator) operates at integer multiples (N) of the desired transmission frequency. The VCO can be phase locked to an integer or fractional multiple of a stable reference oscillator (crystal oscillator). The VCO signal can be distributed to multiple radios at a higher frequency and an N-frequency divider can be used between the distribution amplifier and the Tx / Rx such that its mixer is based on a local oscillator (LO ) signal works. It is easier to resist interference in the VCO when the VCO operates at a different (eg, higher) frequency than the transmission used for the higher power segment. Additionally, techniques such as silicon isolation and the use of noise-immune inductors may also a...

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Abstract

The chip (100) has a voltage controlled oscillator (102) for generating a signal, and comprising a varactor for controlling frequency of the voltage controlled oscillator. A frequency divider circuit (104) is arranged behind a power amplifier (108) for producing reduced frequency variations of the signals of a transmitter mixer (106), where the power amplifier and the voltage controlled oscillator are arranged on a same die. The power amplifier enables orthogonal frequency-division multiplexing output transmission. Independent claims are also included for the following: (1) a method for generating a signal (2) a computer system including a processor.

Description

technical field [0001] The invention relates to an anti-jamming local oscillator. Background technique [0002] A high frequency generator circuit, such as a voltage controlled oscillator (VCO), is used as a local oscillator (LO) to mix signals, for example, to transmit and / or receive information over a wireless or wired channel. Due to the high transmission frequency (for example, above 1GHz), it is difficult to generate "pure" high-frequency signals. Conventional methods of LO generation have high harmonics and spurs that can make receivers insensitive and create spectral compliance challenges for transmitters. Noise on the LO can mix with blockers and desensitize the receiver. This can be even more of a challenge when implementing various transceivers supporting different frequency bands in a single chip. For example, unwanted spectral tones of a local oscillator can interfere with the receiver section of another transceiver. [0003] Direct conversion transmitters ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/40
CPCH03B19/00H03B1/00H03B5/1212H03B5/1296H03B5/1215H03B5/1243H03B5/1265H03B5/1228H03B2200/0088H03B2202/04H03B2202/044H01F2017/0073
Inventor P·戈亚尔C·赫尔
Owner INTEL CORP
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