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Passive mixer bias circuit capable of following threshold voltage of MOS (metal oxide semiconductor) transistor

A technology of MOS transistor and passive mixer, applied in the field of passive mixer bias circuit, can solve the problem that the performance of passive mixer device varies greatly, receiver sensitivity, intermodulation and other characteristics are unstable and function failure. And other issues

Active Publication Date: 2012-01-11
上海圳呈微电子技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, it is difficult for the bias circuit of the passive mixer to take into account the conversion gain, linearity, noise and other performances of the passive mixer while having practical application significance. Therefore, in different environments, The performance of passive frequency mixing devices varies greatly, which further leads to the instability of sensitivity and intermodulation characteristics of RF radio frequency and similar function receivers, so that the functions fail

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  • Passive mixer bias circuit capable of following threshold voltage of MOS (metal oxide semiconductor) transistor
  • Passive mixer bias circuit capable of following threshold voltage of MOS (metal oxide semiconductor) transistor
  • Passive mixer bias circuit capable of following threshold voltage of MOS (metal oxide semiconductor) transistor

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Embodiment Construction

[0031] According to the claims of the present invention and the content disclosed in the summary of the invention, the technical solution of the present invention is specifically as follows:

[0032] see figure 1 As shown, in a passive mixer bias circuit capable of following the threshold voltage of a MOS transistor, the bias circuit 100 shown in the figure includes a threshold voltage self-bias reference circuit 110 for generating a reference current I 0 , the threshold voltage self-bias reference circuit 110 has a third transistor M that constitutes a current mirror 2 , the fourth transistor M 3 , and further includes a first transistor M 0 , the second transistor M 1 and the first resistor R 0 , where, flowing through the fourth transistor M 3 The reference current I 0 It will act on the threshold voltage following unit 120 referred to below. The transistors involved in the threshold voltage self-biasing reference circuit 110 include CMOS transistors fabricated using...

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Abstract

The invention relates to a passive mixer bias circuit, in particular to a passive mixer bias circuit which is used for stabilizing the characteristic of a passive mixer and can follow a threshold voltage of an MOS (metal oxide semiconductor) transistor. The passive mixer bias circuit can stabilize the performances of the conversion gain, the linearity and the noise and the like of the passive mixer in different working environments, and mainly comprises a threshold voltage self-bias reference circuit for generating a current source, and an MOS threshold voltage following device formed by resistors connected in series. The characteristics of the passive mixer (the conversion gain, the linearity and the noise and the like) can be well stabilized by the bias circuit which follows the threshold voltage of the MOS transistor under the condition of different process CORNER, voltage and temperature.

Description

technical field [0001] The present invention generally relates to a passive mixer bias circuit, more precisely, the present invention relates to a passive mixer bias circuit capable of following the threshold voltage of a MOS transistor for stabilizing the characteristics of a passive mixer . Background technique [0002] Passive mixers feature low power consumption and high linearity, and are widely used in RF transceiver systems. Crucially, in practical applications, performance indicators such as conversion gain, linearity, and noise of passive mixers need to remain stable. For passive mixer devices, due to external factors such as process, voltage, temperature, and environment, there is no doubt that in order to maintain stable performance, the passive mixer must require its bias voltage to be very stable. It is good to follow the threshold voltage change of the MOS tube. [0003] In the prior art, it is difficult for the bias circuit of the passive mixer to take into...

Claims

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Application Information

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IPC IPC(8): H03D7/16
Inventor 张旭胡良豹黎传礼
Owner 上海圳呈微电子技术有限公司
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