CN214308802U - Circuit for converting magnetic signals - Google Patents
Circuit for converting magnetic signals Download PDFInfo
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- CN214308802U CN214308802U CN202120002813.XU CN202120002813U CN214308802U CN 214308802 U CN214308802 U CN 214308802U CN 202120002813 U CN202120002813 U CN 202120002813U CN 214308802 U CN214308802 U CN 214308802U
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Abstract
The utility model provides a circuit for converting magnetic signals, a magnetic sensor L1 is used for receiving magnetic change signals and converting the magnetic change signals into electric signals, the circuit is used for amplifying the ultra-low frequency band signal only, and has the advantages of simple structure, low cost, small size and flexible application.
Description
Technical Field
The utility model belongs to the technical field of the magnetic signal conversion and specifically relates to a circuit for changing magnetic signal.
Background
The information carrier is an important mark for measuring the information exchange level, the evolution of the information carrier promotes the development of human information activities, in a certain sense, the information revolution is the revolution of the information carrier, and the invention of telegraph, telephone and radio enables a large amount of information to be transmitted at the speed of light, thereby strengthening the connection of the whole world, the human information activities enter a new era, and the electromagnetic wave and the electric signal become the third information carrier of human beings.
The existing conversion circuit from magnetic signals to electric signals has a complex circuit structure.
SUMMERY OF THE UTILITY MODEL
The utility model provides a circuit for converting magnetic signal, simple structure, flexible operation in order to realize above-mentioned purpose, adopt following technical scheme: the method comprises the following steps: the magnetic sensor L1, the pre-amplifying circuit and the integrated operational amplifier circuit, wherein the magnetic sensor L1 is used for receiving magnetic variation signals and converting the magnetic variation signals into electric signals, the magnetic sensor L1 outputs the signals to the pre-amplifying circuit, and the output end of the pre-amplifying circuit is connected with the integrated operational amplifier circuit to amplify the electric signals; the pre-amplifying circuit includes: the circuit comprises a triode V1, a capacitor C4, a resistor R5 and a resistor R9, wherein the negative electrode of the capacitor C4 is connected with a magnetic sensor L1, the positive electrode of the capacitor C4 is connected with the base electrode of a triode V1, the emitter electrode of the triode V1 is grounded, a resistor R9 is connected between the emitter electrode and the base electrode of the triode V1, the collector electrode of the triode V1 is connected with a battery voltage VCC through a pull-up resistor R1, and a resistor R5 is connected between the collector electrode and the base electrode of the triode V1; the integrated operational amplifier circuit adopts a TLV9002 dual-channel operational amplifier, the reverse end of a TLV9002 channel 1 is connected with a signal output by a collector of a triode V1, and the forward end of the TLV9002 channel 1 is connected with a voltage after voltage division; the output end of the TLV9002 channel 1 is connected with one end of a resistor R8, the other end of the resistor R8 is connected with the forward end of the TLV9002 channel 2, the reverse end of the TLV9002 channel 2 is connected with the divided voltage, a resistor R12 is connected between the output end and the forward end of the TLV9002 channel 2, and the output end of the TLV9002 channel 2 outputs an amplified electric signal.
Preferably, the cathode of the capacitor C4 is connected to the anode of the capacitor C5, and the cathode of the capacitor C5 is grounded for filtering.
Preferably, the collector of the transistor V1 is connected to the anode of the capacitor C3, the cathode of the capacitor C3 is connected to one end of the resistor R6, and the other end of the resistor R6 is connected to the reverse end of the TLV9002 channel 1.
Preferably, the battery voltage VCC is connected with a circuit formed by serially connecting a resistor R2 and a resistor R10, and the forward end of the TLV9002 channel 1 is connected with the common end of the resistor R2 and the resistor R10, and is connected with the voltage after voltage reduction.
Preferably, an RC parallel circuit is connected between the reverse end of the TLV9002 channel 1 and the output end of the TLV9002 channel 1, and the RC parallel circuit is composed of a resistor R4 and a capacitor C2, so as to realize filtering.
Preferably, the battery voltage VCC is connected with a circuit formed by connecting a resistor R3 and a resistor R11 in series, the voltage after voltage reduction is connected to the common end of a resistor R3 and a resistor R11 at the reverse end of the TLV9002 channel 2, and the voltage of the reverse end of the TLV9002 channel 2 is lower than the forward end voltage of the TLV9002 channel 1.
Preferably, the output end of channel 2 of TLV9002 is connected to one end of resistor R7, and the other end of resistor R7 is connected to capacitor C6, so as to implement filtering.
The utility model has the advantages that: this patent utilizes magnetic sensor L1 to realize the acquisition conversion of magnetic signal to accomplish input/output impedance matching when amplifying circuit in advance through preamplification in advance, accomplish the amplifier circuit that selects frequency through TLV9002 operational amplifier, only amplify ultra-low frequency range signal, simple structure, with low costs, small in size and use in a flexible way.
Drawings
Fig. 1 is a schematic circuit diagram of the present patent application.
Detailed Description
The present invention will now be further described with reference to the accompanying drawings.
As shown in fig. 1, the present patent application includes: the magnetic sensor L1, the pre-amplifying circuit and the integrated operational amplifier circuit, the magnetic sensor L1 is used for receiving the magnetic variation signal and converting the magnetic variation signal into an electric signal, the magnetic sensor L1 outputs the collected and converted electric signal to the pre-amplifying circuit, pre-amplification is carried out, and input and output impedance matching is completed at the same time; the output end of the pre-amplifying circuit is connected with the integrated operational amplifier circuit, and the pre-amplifying circuit and the peripheral circuit together complete the frequency-selecting amplifying circuit and only amplify the ultra-low frequency band signals.
The pre-amplification circuit in the present patent application comprises: the triode V1, the capacitor C4, the resistor R5 and the resistor R9, the output signal of the magnetic sensor L1 is input to the negative pole of the capacitor C4, the negative pole of the capacitor C4 is also connected with the positive pole of the capacitor C5, and the negative pole of the capacitor C5 is grounded, so that the filtering effect is realized; the positive electrode of the connecting capacitor C4 is connected with the base electrode of the triode V1, the emitting electrode of the triode V1 is grounded, and the resistor R9 is connected between the emitting electrode and the base electrode of the triode V1, so that the anti-interference capability of the triode V1 is improved; the collector of the triode V1 is connected with the battery voltage VCC through a pull-up resistor R1, and a resistor R5 is connected between the collector and the base of the triode V1 to provide base current for the triode V1 and play a role of negative feedback.
The integrated operational amplifier circuit of this patent application adopts TLV9002 two-channel operational amplifier, and triode V1's collecting electrode connects electric capacity C3 positive pole, and electric capacity C3's negative pole connects resistance R6's one end, and another termination TLV9002 passageway 1's of resistance R6 reverse end for insert the signal of triode V1's collecting electrode output, TLV9002 passageway 1's forward end inserts the voltage after the partial pressure, specifically is: the battery voltage VCC is connected with a circuit formed by connecting a resistor R2 and a resistor R10 in series, the forward end of a TLV9002 channel 1 is connected with the common end of the resistor R2 and the resistor R10, and the voltage is connected with the voltage after voltage reduction; the output end of the TLV9002 channel 1 is connected with one end of a resistor R8, the other end of the resistor R8 is connected with the forward end of the TLV9002 channel 2, and the reverse end of the TLV9002 channel 2 is connected with the divided voltage, specifically: the battery voltage VCC is connected with a circuit formed by connecting a resistor R3 and a resistor R11 in series, the reverse end of the TLV9002 channel 2 is connected with the common end of the resistor R3 and the resistor R11 and is connected with the voltage after voltage reduction, the resistance of the residual resistor R3 of the resistor R2 is the same, the resistance of the resistor R10 is smaller than that of the resistor R11, the voltage of the reverse end of the TLV9002 channel 2 is lower than that of the forward end of the TLV9002 channel 1, the resistor R12 is connected between the output end and the forward end of the TLV9002 channel 2, and the output end of the TLV9002 channel 2 outputs an amplified electric signal.
In order to realize the filtering of signals, an RC parallel circuit consisting of a resistor R4 and a capacitor C2 is connected between the reverse end of the TLV9002 channel 1 and the output end of the TLV9002 channel 1; and the output end of the TLV9002 channel 2 is connected with one end of a resistor R7, and the other end of the resistor R7 is connected with a capacitor C6, so that filtering is realized.
This patent utilizes magnetic sensor L1 to realize the acquisition conversion of magnetic signal to accomplish input/output impedance matching when amplifying circuit in advance through preamplification in advance, accomplish the amplifier circuit that selects frequency through TLV9002 operational amplifier, only amplify ultra-low frequency range signal, simple structure, it is with low costs, and the filtering reduces signal interference many times.
Finally, it should be noted that: the above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention, and the appended claims are intended to cover such modifications and equivalents as fall within the spirit and scope of the invention.
Claims (7)
1. A circuit for converting a magnetic signal, characterized by: the method comprises the following steps: magnetic sensor L1, preamplification circuit, integrated operational amplifier circuit, magnetic sensor L1 is used for receiving the magnetism change signal and converts the signal into the signal of telecommunication, magnetic sensor L1 output signal extremely preamplification circuit, preamplification circuit's output termination the integrated operational amplifier circuit, preamplification circuit includes: the circuit comprises a triode V1, a capacitor C4, a resistor R5 and a resistor R9, wherein the negative electrode of the capacitor C4 is connected with a magnetic sensor L1, the positive electrode of the capacitor C4 is connected with the base electrode of a triode V1, the emitter electrode of the triode V1 is grounded, a resistor R9 is connected between the emitter electrode and the base electrode of the triode V1, the collector electrode of the triode V1 is connected with a battery voltage VCC through a pull-up resistor R1, and a resistor R5 is connected between the collector electrode and the base electrode of the triode V1; the integrated operational amplifier circuit adopts two-channel operational amplifier, and the signal of triode V1's collector output is inserted to passageway 1's reverse end, and the voltage after the partial pressure is inserted to passageway 1's forward end, and passageway 1's output signal to passageway 2's forward end, passageway 2's reverse termination voltage after the partial pressure, connecting resistance R12 between passageway 2's the output and the forward end, passageway 2's output is used for exporting the signal of telecommunication after amplifying.
2. A circuit for transducing magnetic signals according to claim 1, wherein: the negative electrode of the capacitor C4 is connected with the positive electrode of the capacitor C5, and the negative electrode of the capacitor C5 is grounded and used for filtering.
3. A circuit for transducing magnetic signals according to claim 1, wherein: the collector of the triode V1 is connected with the anode of the capacitor C3, the cathode of the capacitor C3 is connected with one end of the resistor R6, and the other end of the resistor R6 is connected with the reverse end of the dual-channel operational amplifier channel 1.
4. A circuit for transducing magnetic signals according to claim 3, wherein: the integrated operational amplifier circuit adopts a TLV9002 dual-channel operational amplifier, the battery voltage VCC is connected with a circuit formed by serially connecting a resistor R2 and a resistor R10, and the forward end of a channel 1 is connected with the common end of a resistor R2 and a resistor R10 and is used for being connected with the voltage after voltage reduction.
5. A circuit for transducing magnetic signals according to claim 4, wherein: an RC parallel circuit is connected between the reverse end of the channel 1 and the output end of the TLV9002 channel 1, and the RC parallel circuit is composed of a resistor R4 and a capacitor C2; the output end of the channel 1 is connected with one end of a resistor R8, and the other end of the resistor R8 is connected with the positive end of the channel 2 and used for outputting signals to the positive end of the channel 2.
6. A circuit for transducing magnetic signals according to claim 4, wherein: the battery voltage VCC is connected with a circuit formed by connecting a resistor R3 and a resistor R11 in series, the common end of a resistor R3 and a resistor R11 at the reverse end of the TLV9002 channel 2 is connected with the voltage after voltage reduction, and the voltage at the reverse end of the TLV9002 channel 2 is lower than the forward end voltage of the TLV9002 channel 1.
7. A circuit for transducing magnetic signals according to claim 4, wherein: the output end of the TLV9002 channel 2 is connected with one end of a resistor R7, and the other end of the resistor R7 is connected with a capacitor C6 for filtering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120002813.XU CN214308802U (en) | 2021-01-04 | 2021-01-04 | Circuit for converting magnetic signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120002813.XU CN214308802U (en) | 2021-01-04 | 2021-01-04 | Circuit for converting magnetic signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214308802U true CN214308802U (en) | 2021-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120002813.XU Active CN214308802U (en) | 2021-01-04 | 2021-01-04 | Circuit for converting magnetic signals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214308802U (en) |
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2021
- 2021-01-04 CN CN202120002813.XU patent/CN214308802U/en active Active
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