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Interference resistant local oscillator

A version, mixer technology, applied in the direction of power oscillators, inductors, fixed inductors, etc., can solve problems such as consumption, expensive solutions, multiple power and chip area

Active Publication Date: 2010-08-04
INTEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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PUM

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Abstract

The name of the invention is interference resistant local oscillator. With some embodiments, a VCO (voltage controlled oscillator) operates at an integer multiple (N) above a desired transmission frequency. The VCO may be phase locked at the integer or fractional multiple to a stable reference oscillator (crystal oscillator). The VCO signal may be distributed to multiple radios at the higher frequency and a divide-by-N frequency divider may be used between a distribution amplifier and a Tx / Rx so that its mixer(s) operate with a local oscillator (LO) signal at the target transmission frequency.

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 Applications(China)
IPC IPC(8): H04B1/40
CPCH03B5/1243H03B19/00H03B5/1215H03B5/1228H03B5/1265H03B5/1296H03B1/00H03B5/1212H03B2200/0088H03B2202/04H03B2202/044H01F2017/0073
Inventor P·戈亚尔C·赫尔
Owner INTEL CORP
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