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Enhanced broadband operation of an active mixer

A mixer, intermediate frequency technology, applied in the field of enhanced broadband operation of active mixers, to solve problems such as mixers not providing performance

Active Publication Date: 2019-07-26
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional mixers do not provide sufficient performance as wireless communication technology improves

Method used

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  • Enhanced broadband operation of an active mixer
  • Enhanced broadband operation of an active mixer
  • Enhanced broadband operation of an active mixer

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Embodiment Construction

[0034] The described technology relates to an improved method, system, apparatus, or apparatus that supports technology for enhanced wideband operation of active mixers. In general, the described techniques provide for the generation of direct current (DC) current in an active mixer that is substantially independent of the amplitude of an input local oscillator (LO) signal. In one example, the mixer bias circuit can generate a bias voltage for the active mixer, the magnitude of the bias voltage depends at least in part on the magnitude of the AC LO signal. The active mixer in the described example can provide substantially constant gain and linearity across a range of amplitudes of the LO signal.

[0035] Some active mixers have linearity issues, and not all types of active mixers can be used at mm-wave frequencies. For example, a double-balanced Gilbert mixer includes two switching devices, a transconductance (gm) device is electrically coupled to each switching device, and ...

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Abstract

Methods, systems, and devices for wireless communication are described for enhanced broadband operation of an active mixer. In an example, the apparatus may include an active mixer that converts between radio frequency (RF) signals and intermediate frequency (IF) signals based at least in part on an alternating current (AC) local oscillator (LO) signal, wherein a direct current (DC) current generated within the active mixer is dependent in part on a bias voltage and the AC LO signal. The apparatus may include a mixer biasing circuit that generates the bias voltage for the active mixer, a magnitude of the bias voltage having an inverse relationship to an amplitude of the AC LO signal.

Description

[0001] cross reference [0002] This patent application claims U.S. Provisional Patent Application No. 62 / 430,774, filed December 6, 2016, entitled "Enhanced Broadband Operation of an Active Mixer," by Yu et al., and Yu et al., filed December 4, 2017. Priority to US Patent Application No. 15 / 831,370, entitled "Enhanced Broadband Operation of an Active Mixer," each of which is assigned to the present assignee. Background technique [0003] The following relates generally to wireless communications, and more specifically to techniques for enhanced wideband operation of active mixers. [0004] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing available system resources (eg, time, frequency, and power). Examples of such multiple-access systems include Code Division Multiple ...

Claims

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Application Information

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IPC IPC(8): H04B1/26
CPCH04B1/26H03D7/1491H03D7/1441H03D7/1458H03D7/1425H03D2200/0043H03B2200/0062
Inventor 俞欣旻T·D·加思曼梁赖简
Owner QUALCOMM INC
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