CN209785726U - Voltage-controlled variable inductor - Google Patents
Voltage-controlled variable inductor Download PDFInfo
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- CN209785726U CN209785726U CN201822249343.8U CN201822249343U CN209785726U CN 209785726 U CN209785726 U CN 209785726U CN 201822249343 U CN201822249343 U CN 201822249343U CN 209785726 U CN209785726 U CN 209785726U
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Abstract
The utility model discloses a voltage-controlled variable inductor, which comprises three functional blocks, namely A, B, C; the functional block A comprises a capacitor and an inductor, one end of the capacitor is connected with the radio frequency input end, the other end of the capacitor is connected with the inductor, and the other end of the inductor is connected with the functional block B; the function block B comprises a variable capacitance diode, the anode of the variable capacitance diode is connected with the radio frequency signal output end, and the cathode of the variable capacitance diode is connected with the function block A; function block C includes a choke network connected between the controllable voltage source on one end and function block A, B on the other end, and a capacitor. The utility model discloses variable inductance's maximum inductance value is confirmed by the inductance value of electric capacity and inductance series equivalence, changes partial appearance value through the electric control by varactor and reaches the changeable purpose of inductance, realizes the intellectuality of inductance, variable inductance's is small simultaneously. The use of gallium arsenide material can make the variable inductor work at higher temperature and in high frequency circuit, and the gallium arsenide material has the characteristics of low noise and strong radiation resistance.
Description
Technical Field
the utility model relates to an electronic components, in particular to voltage-controlled variable inductance.
Background
The development of wireless communication technology is changing day by day and gradually becomes an essential part of people's life. In a wireless communication circuit, an inductance is always an indispensable part.
The conventional inductor is usually a fixed inductance value, and once the inductance value is determined, the inductance value in the circuit is usually unchangeable, if the current inductance value is not suitable any more due to the change of the use environment, the current inductance value is modified to be troublesome, or when the circuit is debugged, the inductance value needs to be replaced for many times by using different inductance values to test the circuit, and the continuous inductance value cannot be adjusted due to the fixation of the inductance value.
Therefore, how to continuously change the inductance value in a simpler way to make the inductance more accurate, thereby optimizing the circuit is a new idea for improving the inductance.
SUMMERY OF THE UTILITY MODEL
the utility model aims at providing a locate voltage-controlled variable inductance on gallium arsenide substrate material changes the purpose that partial appearance value reaches regulation inductance through varactor, has realized that the regulation of inductance is intelligent.
In order to achieve the above function, the utility model provides a following scheme:
a voltage-controlled variable inductor comprises three functional blocks, A, B, C; wherein:
The functional block A comprises a capacitor C1 and an inductor L1, one end of the capacitor C1 is connected with the radio frequency input end, the other end of the capacitor C1 is connected with the inductor L1, one end of the inductor L1 is connected with the capacitor C1, and the other end of the inductor L1 is connected with the functional block B;
The functional block B comprises a variable capacitance diode D1, the positive electrode of the variable capacitance diode D1 is connected with the radio frequency signal output end, and the negative electrode of the variable capacitance diode D1 is connected with the inductor L1 of the functional block A;
The function block C comprises a choke network N1 and a capacitor C2, wherein one end of the choke network N1 is connected with the controllable voltage source, the other end is connected between the function blocks A, B, one end of the capacitor C2 is grounded, and the other end is connected with the controllable voltage source.
Preferably, the device further comprises three pads, which are P1, P2 and P3, respectively, wherein P1 and P2 form two ends of the voltage-controlled variable inductor, P1 is a radio frequency signal input end, P2 is a radio frequency signal output end, and P3 is an adjusting end of the voltage-controlled variable inductor and is connected to a controllable voltage source.
Preferably, the three pads P1, P2, P3 and the three functional blocks A, B, C are electrically connected by 5 nodes, wherein node 1 connects P1 to functional block a, node 2 connects functional block A, B, C, node 3 connects P2 to functional block B, node 4 connects P3 to functional block C, and node 5 connects functional block C to ground.
Preferably, a plurality of series groups formed by respectively connecting different capacitors and inductors in series are preset in the functional block a, and the maximum inductance value of the variable inductor is changed by changing the combination of the access circuits; a plurality of different capacitors or variable capacitance diode groups are preset in the functional block B, and the adjustable range of the inductance is enlarged by changing the variable capacitance diode connected into the circuit.
preferably, the series set of capacitors and inductors in the desired functional block a and the capacitors or varactors in the functional block B are selected for connection by manual selection prior to packaging.
preferably, a multi-way switch is added between the functional blocks A and B, and when the multi-way switch is used, the series connection of the capacitance and the inductance in the functional block A and the capacitance or the varactor in the functional block B are changed by adjusting the on state of the multi-way switch.
Preferably, the choke network N1 is a choke inductor or a choke resistor.
Preferably, the controllable voltage source is one of an output voltage of a loop filter, an output voltage of a micro control unit MCU, or an output voltage adjusted by hand.
Preferably, the voltage-controlled variable inductor is arranged on a gallium arsenide substrate or a printed circuit board.
Another solution of voltage-controlled variable inductance includes three functional blocks, respectively A, B, C; wherein:
The functional block A comprises a capacitor C1 and an inductor L1, one end of the capacitor C1 is connected with the radio frequency input end, the other end of the capacitor C1 is connected with the inductor L1, one end of the inductor L1 is connected with the capacitor C1, and the other end of the inductor L1 is connected with the radio frequency signal output end;
The functional block B comprises a variable capacitance diode D1, wherein the anode of the variable capacitance diode D1 is connected with the radio frequency signal output end, and the cathode of the variable capacitance diode D1 is connected with the radio frequency input end;
the function block C comprises a choke network N1 and a capacitor C2, wherein one end of the choke network N1 is connected with a controllable voltage source, the other end is connected with a radio frequency input end, one end of the capacitor C2 is grounded, and the other end is connected with the controllable voltage source.
The scheme has the following advantages:
The utility model provides a voltage-controlled variable inductance uses gallium arsenide substrate material can make variable inductance work under higher temperature, also can the steady operation in high frequency circuit moreover, and gallium arsenide material has characteristics small in noise, radiation resistance are strong in addition. The maximum inductance value of the variable inductance is determined by the equivalent inductance value of the series connection of the capacitor and the inductor, the variable capacitance diode changes part of the capacitance value through electric regulation to achieve the purpose of inductance variable, the intellectualization of the inductance is realized, and meanwhile, the variable inductance of the scheme has small volume.
Drawings
The invention will be further described with reference to the following drawings and examples:
Fig. 1 is a topology diagram of a voltage-controlled variable inductor of embodiment 1;
Fig. 2 is a schematic diagram of a voltage-controlled variable inductor of embodiment 1;
FIG. 3 is an expanded topology of the voltage controlled variable inductor of embodiment 2;
Fig. 4 is a topology diagram of the voltage-controlled variable inductor of embodiment 3.
Detailed Description
Example 1
Referring to fig. 1 and 2, fig. 1 is a topological diagram of a voltage-controlled variable inductor according to an embodiment of the present invention, and fig. 2 is a structural schematic diagram corresponding thereto.
in a specific embodiment of the present invention, the present invention provides a voltage-controlled variable inductor, which is composed of 3 pads, i.e. solder pads, and 3 functional blocks, wherein the 3 solder pads are respectively named as P1, P2, P3, and the 3 functional blocks are respectively named as A, B, C. The 3 pads and 3 functional blocks are electrically connected by 5 nodes, where node 1 connects P1 to block A, node 2 connects block A, B, C, node 3 connects P2 to block B, node 4 connects P3 to block C, and node 5 connects block C to ground. P1 and P2 form two ends of the voltage-controlled variable inductor, P1 is the input end of radio frequency signal, P2 is the output end of radio frequency signal. P3 is the adjusting end of the voltage-controlled variable inductor and is connected with a controllable voltage source. The controllable voltage source is one of the output voltage of the loop filter, the output voltage of the micro control unit MCU, or the output voltage adjusted by hand.
Function block a is entered through node 1 from P1 and connected to function block B, C through node 2. The function block determines the inductance maximum value of the whole variable inductor, and can improve the Q value of the circuit, namely the quality factor of the circuit, and realize the function of isolating direct current. This functional block comprises the series connection of a condenser C1 and an inductance L1, and wherein the effect of condenser C1 is for keeping apart the direct current, and one end is in node 1 department, and another termination inductance L1 prevents that external direct current signal from passing through this variable inductance, therefore the big value should be taken to the value of condenser C1 to reduce the influence to variable inductance, guarantee that variable inductance can normally work, simultaneously, the high Q value of condenser C1 can promote the Q value of whole variable inductance. One end of the inductor L1 is connected with the capacitor C1, the other end is connected with the node 2, the inductance value of the functional block is actually the equivalent inductance value formed by connecting the inductor L1 and the capacitor C1 in series, wherein the inductance value of the inductor L1 is L, and the capacitance value of the capacitor C1 is C.
Function block B is connected to function block A, C through node 2 and to P3 at P2 through node 3. The functional block is used for changing the inductance value of the variable inductor. The function block is composed of a variable capacitance diode D1, the anode is connected with the node 3, namely the radio frequency signal output end, the cathode is connected with the node 2, the reverse bias connection method is adopted, the reverse bias voltage is changed to control the capacitance value of the variable capacitance diode D1, and the capacitance value is controlled in the adjustable rangein the enclosure, as the reverse bias voltage is increased, the capacitance value is reduced, so that the inductance value of the whole circuit is changed, and the purpose of changing the inductance value through voltage change is achieved, wherein the capacitance value of the variable capacitance diode D1 is CV。
Function block C is connected to function block A, B through node 2, P3 through node 4, and ground through node 5. Ideally, the dc voltage source outputs a steady voltage, but in practice, the dc voltage source will have an ac signal component during operation. Therefore, the function block C mainly functions to filter out the ac component in the controllable voltage source, and isolate the dc path and the rf path, so as to provide a stable reverse bias voltage for the varactor diode D1 in the function block B. The block is formed by a capacitor C2 and a choke network N1, wherein the capacitor C2 performs a filtering function and is connected at one end to node 4 and at the other end to node 5, so that the ac component of the control voltage source is passed through the capacitor C2 to ground. Choke network N1, which is shown as a choke inductor or a choke resistor, N1, serves to isolate the rf signal and is connected at one end to node 4 and at the other end to node 2, so that the controllable voltage source controls the voltage of block B via block C, while avoiding loss of signal due to rf path signal via block C.
At this time, the inductive reactance expression of the whole voltage-controlled variable inductor
The expression of the equivalent inductance is
Example 2
Referring to fig. 3, fig. 3 is a diagram illustrating an embodiment of the present invention.
Different series groups of capacitance and inductance are preset in the functional block A, the maximum inductance value of the variable inductance is changed by changing the combination of the access circuit, different capacitance or variable capacitance diode groups are preset in the functional block B, and the adjustable range of the inductance is enlarged by changing the variable capacitance diode of the access circuit. The functions can be manually selected before packaging, a needed capacitance and inductance group in the functional block A and a needed capacitance or variable capacitance diode in the functional block B are selected to be connected, the structure is relatively simple, or a switch is added between the functional blocks A and B, and the combination of the access circuits is changed by adjusting an electric signal when the switch is used, so that the adjustment range of the variable inductance is wider, and the switch can adapt to more environments. The inductor of the scheme can be used on gallium arsenide, printed circuit boards and other materials.
Example 3
The circuit is a series voltage-controlled variable inductor, and can also be completed by a parallel structure. The parallel structure is shown in figure 4 below.
similar to the serial structure, the parallel structure is also composed of 3 pads and 3 function blocks, wherein the pads are respectively P1, P2 and P3, and the function blocks are respectively a function block a, a function block B and a function block C, except that the serial structure connects the function block a and the function block B in series, and the parallel structure connects the function block a and the function block B in parallel. The functional block A comprises a capacitor C1 and an inductor L1, one end of the capacitor C1 is connected with the radio frequency input end, the other end of the capacitor C1 is connected with the inductor L1, one end of the inductor L1 is connected with the capacitor C1, and the other end of the inductor L1 is connected with the radio frequency signal output end; the functional block B comprises a variable capacitance diode D1, wherein the anode of the variable capacitance diode D1 is connected with the radio frequency signal output end, and the cathode of the variable capacitance diode D1 is connected with the radio frequency input end; the function block C comprises a choke network N1 and a capacitor C2, wherein one end of the choke network N1 is connected with a controllable voltage source, the other end is connected with a radio frequency input end, one end of the capacitor C2 is grounded, and the other end is connected with the controllable voltage source.
The inductance expression of the variable inductor is
an equivalent inductance value of
It is right above the utility model provides a detailed introduction of voltage-controlled variable inductance to provide right the utility model discloses a several kinds of expansion scheme.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All modifications made according to the spirit of the main technical scheme of the present invention shall be covered within the protection scope of the present invention.
Claims (10)
1. A voltage-controlled variable inductor is characterized by comprising three functional blocks, namely A, B, C; wherein:
the functional block A comprises a capacitor C1 and an inductor L1, one end of the capacitor C1 is connected with the radio frequency input end, the other end of the capacitor C1 is connected with the inductor L1, one end of the inductor L1 is connected with the capacitor C1, and the other end of the inductor L1 is connected with the functional block B;
The functional block B comprises a variable capacitance diode D1, the positive electrode of the variable capacitance diode D1 is connected with the radio frequency signal output end, and the negative electrode of the variable capacitance diode D1 is connected with the inductor L1 of the functional block A;
The function block C comprises a choke network N1 and a capacitor C2, wherein one end of the choke network N1 is connected with the controllable voltage source, the other end is connected between the function blocks A, B, one end of the capacitor C2 is grounded, and the other end is connected with the controllable voltage source.
2. the voltage-controlled variable inductor of claim 1 further comprising three pads, P1, P2, and P3, wherein P1 and P2 form two terminals of the voltage-controlled variable inductor, P1 is a radio frequency signal input terminal, P2 is a radio frequency signal output terminal, and P3 is an adjustment terminal of the voltage-controlled variable inductor and is connected to a controllable voltage source.
3. The voltage controlled variable inductor of claim 2, wherein the three pads P1, P2, P3 and the three function blocks A, B, C are electrically connected by 5 nodes, wherein node 1 connects P1 to function block a, node 2 connects function block A, B, C, node 3 connects P2 to function block B, node 4 connects P3 to function block C, and node 5 connects function block C to ground.
4. The voltage-controlled variable inductor according to claim 1, wherein a plurality of series groups of different capacitors and inductors are preset in the functional block a, and the maximum inductance value of the variable inductor is changed by changing the combination of the access circuits; a plurality of different capacitors or variable capacitance diode groups are preset in the functional block B, and the adjustable range of the inductance is enlarged by changing the variable capacitance diode connected into the circuit.
5. The voltage-controlled variable inductor of claim 4, wherein the series of capacitors and inductors in functional block A and capacitors or varactors in functional block B are selected for connection by manual selection prior to packaging.
6. The voltage-controlled variable inductor according to claim 4, wherein a multi-way switch is added between the functional blocks A and B, and the series connection of the capacitor inductor in the functional block A and the capacitor or the varactor in the functional block B are changed to be connected by adjusting the on-state of the multi-way switch when in use.
7. the voltage-controlled variable inductor of claim 3, wherein said choke network N1 is a choke inductor or a choke resistor.
8. The voltage-controlled variable inductor according to claim 3, wherein the controllable voltage source is one of an output voltage of a loop filter, an output voltage of a Micro Control Unit (MCU), or an output voltage adjusted manually.
9. The voltage-controlled variable inductor according to any one of claims 1-7, wherein the voltage-controlled variable inductor is disposed on a gallium arsenide substrate or a printed circuit board.
10. a voltage-controlled variable inductor is characterized by comprising three functional blocks, namely A, B, C; wherein:
the functional block A comprises a capacitor C1 and an inductor L1, one end of the capacitor C1 is connected with the radio frequency input end, the other end of the capacitor C1 is connected with the inductor L1, one end of the inductor L1 is connected with the capacitor C1, and the other end of the inductor L1 is connected with the radio frequency signal output end;
the functional block B comprises a variable capacitance diode D1, wherein the anode of the variable capacitance diode D1 is connected with the radio frequency signal output end, and the cathode of the variable capacitance diode D1 is connected with the radio frequency input end;
The function block C comprises a choke network N1 and a capacitor C2, wherein one end of the choke network N1 is connected with a controllable voltage source, the other end is connected with a radio frequency input end, one end of the capacitor C2 is grounded, and the other end is connected with the controllable voltage source.
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| CN201822249343.8U CN209785726U (en) | 2018-12-29 | 2018-12-29 | Voltage-controlled variable inductor |
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| CN201822249343.8U CN209785726U (en) | 2018-12-29 | 2018-12-29 | Voltage-controlled variable inductor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109637788A (en) * | 2018-12-29 | 2019-04-16 | 厦门英诺迅科技有限公司 | A kind of voltage-controlled variable inductance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109637788A (en) * | 2018-12-29 | 2019-04-16 | 厦门英诺迅科技有限公司 | A kind of voltage-controlled variable inductance |
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