CN203225720U - Voltage-reversal type negative impedance converter - Google Patents
Voltage-reversal type negative impedance converter Download PDFInfo
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- CN203225720U CN203225720U CN 201320205960 CN201320205960U CN203225720U CN 203225720 U CN203225720 U CN 203225720U CN 201320205960 CN201320205960 CN 201320205960 CN 201320205960 U CN201320205960 U CN 201320205960U CN 203225720 U CN203225720 U CN 203225720U
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Abstract
The utility model discloses a voltage-reversal type negative impedance converter, comprising a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first resistor, a second resistor, a third resistor and an amplifier. The in-phase input terminal of the amplifier is respectively connected to the first terminal of the first capacitor, the first terminal of the second capacitor, the first terminal of the third capacitor and the first terminal of the fourth capacitor. The inverting input terminal of the amplifier is respectively connected to the first terminal of the first resistor and the first terminal of the second resistor. The signal output terminal of the amplifier is respectively connected to the first terminal of the third resistor, the second terminal of the fourth capacitor and the second terminal of the second resistor. The second terminal of the third capacitor is connected to the positive electrode of power supply. The voltage-reversal type negative impedance converter is simple in structure, high in working efficiency and stable in working state.
Description
Technical field
The utility model relates to a kind of negative impedance converter, relates in particular to a kind of voltage reversal type negative impedance converter.
Background technology
Foster reactance theory refers to a passive loss-free one port network, its input reactance and susceptance all are strictly monotone increasing functions of frequency, violate this theoretical circuit and be referred to as non-Foster circuit, non-Foster circuit is a kind of active circuit that can produce negative impedance, and general sort circuit can be realized by negative impedance converter.Because the negative reactance characteristic of non-Foster circuit is opposite with the passive reactive elements characteristic, so can go to offset unwanted reactance with sort circuit, thereby reach the purpose of impedance conversion or impedance matching, it successfully is applied in active filter and the oscillator.A focus of people research in recent years is to mate electronically small antenna with non-Foster circuit, and it is the effective working band of broadening electronically small antenna not only; And can improve the reception antenna signal to noise ratio, improve the transmitting antenna radiation efficiency.The operating state of negative impedance converter is in the market stablized inadequately, operating efficiency is not high enough.
The utility model content
The purpose of this utility model just is to provide in order to address the above problem the voltage reversal type negative impedance converter of a kind of simple in structure, high efficiency, stable working state.
In order to achieve the above object, the utility model has adopted following technical scheme:
A kind of voltage reversal type negative impedance converter, comprise first electric capacity, second electric capacity, the 3rd electric capacity, the 4th electric capacity, first resistance, second resistance, the 3rd resistance and amplifier, the in-phase input end of described amplifier respectively with first end of described first electric capacity, first end of described second electric capacity, first end of described the 3rd electric capacity is connected with first end of described the 4th electric capacity, described amplifier's inverting input is connected with first end of described first resistance and first end of described second resistance respectively, the signal output part of described amplifier respectively with first end of described the 3rd resistance, second end of described the 4th electric capacity is connected with second end of described second resistance, second end of described the 3rd electric capacity is connected with the cathode output end of voltage source, the cathode output end of described voltage source is connected back ground connection with second end of described first resistance and second end of described the 3rd resistance respectively, and second end of described first electric capacity and second end of described second electric capacity be ground connection respectively.
The beneficial effects of the utility model are:
Simple in structure, the high efficiency of the utility model voltage reversal type negative impedance converter, stable working state.
Description of drawings
Fig. 1 is the circuit diagram of the utility model voltage reversal type negative impedance converter.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, the utility model voltage reversal type negative impedance converter, comprise first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, first resistance R 1, second resistance R 2, the 3rd resistance R 3 and amplifier IC, the in-phase input end of amplifier IC respectively with first end of first capacitor C 1, first end of second capacitor C 2, first end of the 3rd capacitor C 3 is connected with first end of the 4th capacitor C 4, the inverting input of amplifier IC is connected with first end of first resistance R 1 and first end of second resistance R 2 respectively, the signal output part of amplifier IC respectively with first end of the 3rd resistance R 3, second end of the 4th capacitor C 4 is connected with second end of second resistance R 2, second end of the 3rd capacitor C 3 is connected with the cathode output end of voltage source V S, the cathode output end of voltage source V S is connected back ground connection with second end of first resistance R 1 and second end of the 3rd resistance R 3 respectively, and second end of second end of first capacitor C 1 and second capacitor C 2 is ground connection respectively.
Use the operation principle of the utility model voltage reversal type negative impedance converter as follows:
The 3rd capacitor C 3 is positive feedback electric capacity, first capacitor C 1 is by the negative capacitance of the 4th capacitor C 4 equivalences to input, the 3rd capacitor C 3 is signal source equivalent series electric capacity, second resistance R 2 is negative feedback resistor, first resistance R 1 is gain-adjusted resistance, the 3rd resistance R 3 is the load resistance of amplifier, and second capacitor C 2 is amplifier input equivalent capacity.
Claims (1)
1. voltage reversal type negative impedance converter, it is characterized in that: comprise first electric capacity, second electric capacity, the 3rd electric capacity, the 4th electric capacity, first resistance, second resistance, the 3rd resistance and amplifier, the in-phase input end of described amplifier respectively with first end of described first electric capacity, first end of described second electric capacity, first end of described the 3rd electric capacity is connected with first end of described the 4th electric capacity, described amplifier's inverting input is connected with first end of described first resistance and first end of described second resistance respectively, the signal output part of described amplifier respectively with first end of described the 3rd resistance, second end of described the 4th electric capacity is connected with second end of described second resistance, second end of described the 3rd electric capacity is connected with the cathode output end of voltage source, the cathode output end of described voltage source is connected back ground connection with second end of described first resistance and second end of described the 3rd resistance respectively, and second end of described first electric capacity and second end of described second electric capacity be ground connection respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320205960 CN203225720U (en) | 2013-04-23 | 2013-04-23 | Voltage-reversal type negative impedance converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320205960 CN203225720U (en) | 2013-04-23 | 2013-04-23 | Voltage-reversal type negative impedance converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203225720U true CN203225720U (en) | 2013-10-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320205960 Expired - Fee Related CN203225720U (en) | 2013-04-23 | 2013-04-23 | Voltage-reversal type negative impedance converter |
Country Status (1)
| Country | Link |
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| CN (1) | CN203225720U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160698A (en) * | 2015-03-27 | 2016-11-23 | 南京理工大学 | A kind of negative N square of impedance transformer |
-
2013
- 2013-04-23 CN CN 201320205960 patent/CN203225720U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160698A (en) * | 2015-03-27 | 2016-11-23 | 南京理工大学 | A kind of negative N square of impedance transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131002 Termination date: 20140423 |