Signal generation circuit
US-9225288-B2 · Dec 29, 2015 · US
Transconductance-enhancing passive frequency mixer
US8933745B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8933745-B2 |
| Application number | US-201213980355-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 29, 2012 |
| Priority date | Dec 20, 2011 |
| Publication date | Jan 13, 2015 |
| Grant date | Jan 13, 2015 |
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Abstract
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A transconductance-enhancing passive frequency mixer comprises a transconductance amplification stage, a frequency mixing stage, and an output transresistance amplifier. The transconductance amplification stage has a pre-amplification transconductance-enhancing structure, so that the transconductance is greatly enhanced, thereby obtaining the same transconductance value at a lower bias current. A radio-frequency current is modulated by the frequency mixing stage to generate an output mid-frequency current signal. The mid-frequency current signal passes through the transresistance amplifier, to form voltage output, and finally obtain a mid-frequency voltage signal. The transresistance amplifier has a transconductance-enhancing structure, thereby further reducing input impedance, and improving current utilization efficiency and port isolation. The frequency mixer has the characteristics of low power consumption, high conversion gain, good port isolation, and the like.
First claim
Opening claim text (preview).
The invention claimed is: 1. A transconductance enhanced passive frequency mixer, comprising a transconductance stage with enhanced transconductance, a passive frequency mixing switch pair, and an output transresistance amplifier, wherein, the transconductance stage employs a pre-amplified transconductance enhancement structure with enhanced transconductance and converts input RF voltage into RF currents, which is frequency mixed via a dual balanced frequency mixing switch pair, an…
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- H03D7/1441Primary
Electricity · mapped topic
- H03H11/0466Primary
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US8933745B2 cover?
- A transconductance-enhancing passive frequency mixer comprises a transconductance amplification stage, a frequency mixing stage, and an output transresistance amplifier. The transconductance amplification stage has a pre-amplification transconductance-enhancing structure, so that the transconductance is greatly enhanced, thereby obtaining the same transconductance value at a lower bias current.…
- Who is the assignee on this patent?
- Wu Jianhui, Shi Xiao, Chen Chao, and 7 more
- What technology area does this patent fall under?
- Primary CPC classification H03D7/1441. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 13 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).