Differential voltage type current conveyor and biquad filter circuit

A current transmitter and differential voltage technology, applied in electrical components, frequency selective two-terminal pair networks, networks using active components, etc., can solve problems such as lack of electrical tuning characteristics, achieve gain and wide application , the effect of simple structure

Active Publication Date: 2016-11-16
湖南纽帕科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although DVCC has excellent differential-mode input characteristics and high common-mode signal rejection capability, it has a big disadvantage, that is, it does not have electrical tuning characteristics.

Method used

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  • Differential voltage type current conveyor and biquad filter circuit
  • Differential voltage type current conveyor and biquad filter circuit
  • Differential voltage type current conveyor and biquad filter circuit

Examples

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] Such as image 3 , Figure 4 As shown, a differential voltage current transmitter includes a switch control circuit 1, the first to sixteenth MOS transistors M16, the gate of the first MOS transistor M1 serves as the Y2 terminal of the differential voltage current transmitter, and the first The source of the first MOS transistor M1 and the second MOS transistor M2 are connected to the drain of the fifth MOS transistor M5, the drain of the first MOS transistor M1, the drain of the third MOS transistor M3, and the drain of the seventh MOS transistor M7 , The gate of the seventh MOS transistor M7 is connected to the gate of the eighth MOS transistor M8, the gates of the fifth MOS transistor M5 and the sixth MOS transistor M6 are connected to the external bias voltage Vb1, and the gate of the second MOS transistor M2 is grounded , the drains of the...

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PUM

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Abstract

The invention discloses a differential voltage type current conveyor, comprising a switch control circuit, and first to sixteenth MOS transistors. The switch control circuit is a switch array controlled by a digital signal. The switch control circuit comprises 2M PMOS transistors and 2M NMOS transistors. The differential voltage type current conveyor provided by the invention comprises the switch control circuit. The switch control circuit comprises the PMOS transistors and the NMOS transistors of the same quantity. The PMOS transistors and the NMOS transistors form the switch array controlled by the digital signal. Therefore, the current of the Z output end of the differential voltage type current conveyor is controlled. The differential voltage type current conveyor has digital controllable current gain, a differential voltage input characteristic of a current conveyor and an electric tuning characteristic, and has the advantages of simple structure and wide application range. The invention also discloses a biquad filter circuit comprising the differential voltage type current conveyor.

Description

technical field [0001] The invention relates to a current transmitter, in particular to a differential voltage current transmitter and a biquad filter circuit comprising the same. Background technique [0002] As an important branch of the continuous time filter, the current conveyor (current converter: CCll) and the filter circuit composed of its derived active devices have been favored by scholars since they were proposed in the 1970s. As the most basic current mode circuit building block, CCll is widely used in filtering, oscillation, amplification, etc. because of its wide signal bandwidth, large dynamic range, simple current structure and low power consumption. However, CCll There is only one high-impedance voltage input terminal (Y). This defect is particularly obvious when dealing with differential signals, which are used in modern analog signal processing, automatic control processes, and other communication or radio frequency systems. widely. Therefore, differenti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H11/12
CPCH03H11/1217
Inventor 周细凤曾荣周陈子逸
Owner 湖南纽帕科技有限公司
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