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Radio frequency buffering amplifying circuit

A technology of buffer amplification and buffer amplifier, which is applied in the electronic field, can solve the problem of low utilization efficiency of bias current, and achieve the effect of saving area and reducing power consumption

Active Publication Date: 2011-05-11
SOI MICRO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, no current flows through the resonant network 120, and the effective load is only the resonant network 110. The utilization efficiency of the bias current is not high

Method used

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0029] figure 2 What is shown is a specific embodiment of the radio frequency buffer amplifier circuit provided by the present invention, and this circuit is usually realized by an integrated circuit. This circuit includes the lower input transistor pair M3 230 and M4 240 , the upper input transistor pair M5 250 and M6 260 , the inductor L1 280 , the capacitor C1 290 , and the switched capacitor array C 200 . In the present invention, M3 230 and M4 240 are NMOS transistors, and M5 250 and M6 260 are PMOS transistors. The DC point of the output can be adjusted by adjusting the width-to-length ratio of the PMOS tube and the NMOS tube. Usually, the W / L of the PMOS transistor is set to 2.5 times that of the NMOS, so that th...

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Abstract

The invention provides a circuit for frequency-selective buffer amplification of RF signals, which comprises an input stage used for converting RF input voltage into current and a resonance circuit with frequency selection. The input stage is driven by a RF signal to generate two channels current with opposite directions on both ends of the resonance circuit; the two channels current pass throughthe resonance circuit along the same direction. The two channels current are output by the frequency selection amplifier on both ends of the resonance circuit in voltage form. A switch capacitor array realizes the switching of resonance frequency points. The circuit provided by the invention can save power consumption by a half. Meanwhile, when chips are used to realize the circuit, the chip areais saved by approximate a half.

Description

technical field [0001] The invention relates to the field of electronic technology, provides strong driving capability under low power consumption, is suitable for buffering and amplifying output of radio frequency signals, and is especially suitable for buffering and amplifying output of (voltage-controlled) oscillator signals in integrated circuits. Background technique [0002] We are in the era of rapid development of wireless technology. Mobile phones, wireless local area networks, data and voice exchanges are gradually changing the world's business models and people's lifestyles. The transmission and reception of wireless data takes high-frequency signals as the carrier, and through the modulation of the transmitter, the low-frequency signals are converted into high-frequency signals for transmission; the receiver separates the low-frequency useful signals from the high-frequency through demodulation. An important building block in a wireless transceiver is the (voltag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F3/19H03F3/193H03F3/45
Inventor 高海军阎跃鹏
Owner SOI MICRO CO LTD