CN213754504U - Multi-frequency band control circuit - Google Patents
Multi-frequency band control circuit Download PDFInfo
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- CN213754504U CN213754504U CN202023263464.1U CN202023263464U CN213754504U CN 213754504 U CN213754504 U CN 213754504U CN 202023263464 U CN202023263464 U CN 202023263464U CN 213754504 U CN213754504 U CN 213754504U
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Abstract
The utility model relates to a relevant high frequency transmission system field that multifrequency section switches, concretely relates to multifrequency section control circuit. The multi-band control circuit comprises an input radio frequency signal, a first channel filter, a first radio frequency change-over switch, a second channel filter, a second radio frequency change-over switch and a single chip microcomputer; the first radio frequency change-over switch is respectively connected with the first channel filter, the second channel filter and the single chip microcomputer through signal lines in a control mode, the first channel filter, the second channel filter and the single chip microcomputer are respectively connected with the second radio frequency change-over switch through signal lines, and the second radio frequency change-over switch is connected with the output radio frequency signal line. The utility model can realize the sectional control only by a simple network communication; the system can switch radio frequency signals in multiple frequency bands, realize smooth switching signals, switch signals continuously, remotely control the opening and closing of equipment and has high cost performance.
Description
Technical Field
The utility model relates to a relevant high frequency transmission system field that multifrequency section switches, concretely relates to multifrequency section control circuit.
Background
With the development of the communication industry, the use of high frequency bands is diversified, and the increase of the frequency band of high frequency signals is accompanied. In the broadcasting and television, telecommunication and communication industries, the remote switching of high-frequency signals in different frequency bands is realized, the stable transmission of network signals is ensured, and the protocol transmission is carried out to a monitoring platform through a singlechip and a network manager. Realize the long-range switching signal and guarantee quick response. Ensuring the normal operation of the network. In order to realize that the multi-band control circuit is mainly closed by a front-end server in the market at present, the technical requirement on the front-end server is high, the equipment is complex, and the price is high. Therefore, a multi-band control circuit is needed to realize switching control by using devices with different frequencies.
Disclosure of Invention
In order to solve the defects in the prior art, the utility model provides a multi-band control circuit, which can realize the segmented control only by a simple network communication; the multi-band control circuit realizes switching signals with different frequencies, realizes quick switching and has high cost performance.
According to the technical scheme provided by the utility model, a multifrequency section control circuit, it includes input radio frequency signal, first channel filter, first radio frequency change over switch, second channel filter, second radio frequency change over switch and singlechip; the first radio frequency change-over switch is respectively connected with the first channel filter, the second channel filter and the singlechip through signal lines in a control way, the first channel filter, the second channel filter and the singlechip are respectively connected with the second radio frequency change-over switch through signal lines, and the second radio frequency change-over switch is connected with an output radio frequency signal line;
the input end of a first high-frequency signal switching integrated chip U2 of the first radio-frequency switch is connected with the input end signal RF IN, and the output end of a second high-frequency signal switching integrated chip U3 of the second radio-frequency switch is connected with the output end of the input end signal RF OUT;
the radio frequency signal to be transmitted enters a first high-frequency signal switching integrated chip U2 through an RF IN for switching, wherein one path is switched with a first radio frequency matching resistor R1, and system impedance matching is carried out when the signal is disconnected; and the TX1 and TX2 input by the singlechip control circuit realize control.
As a further improvement, the first high-frequency signal switches the integrated chip and is connected with first channel filter, second channel filter and first high-frequency signal switching integrated chip through the signal line respectively, first channel filter switches the integrated chip through first matching inductance and second high-frequency signal and is connected, second channel filter switches the integrated chip through second matching inductance and second high-frequency signal and is connected.
As a further improvement of the present invention, the first rf switch includes a first high-frequency signal switching integrated chip, a first rf matching resistor, a first current-limiting resistor, a first filter capacitor, a second filter capacitor, a first isolation resistor, a second isolation resistor, a third filter capacitor, and a fifth filter capacitor; the first radio frequency matching resistor, the first current limiting resistor, the first isolation resistor and the second isolation resistor are respectively connected with the first high-frequency signal switching integrated chip through signal lines; one ends of the first filter capacitor and the second filter capacitor are respectively connected with the first current limiting resistor, and the other ends of the first filter capacitor and the second filter capacitor are grounded. One end of the third filter capacitor is connected with the first isolation resistor, and the other end of the third filter capacitor is grounded; one end of the fifth filter capacitor is connected with the second isolation resistor, and the other end of the fifth filter capacitor is grounded.
As a further improvement of the present invention, the second rf switch includes a second high-frequency signal switching integrated chip, a fourth filter capacitor, a sixth filter capacitor, a seventh filter capacitor, a third isolation resistor, a fourth isolation resistor, a second current-limiting resistor, and a second rf matching resistor; the third isolation resistor, the fourth isolation resistor, the second current-limiting resistor and the second radio-frequency matching resistor are respectively connected with the second high-frequency signal switching integrated chip through signal lines, one end of the fourth filter capacitor is connected with the third isolation resistor through the signal lines, and the other end of the fourth filter capacitor is grounded through the signal lines; one end of the sixth filter capacitor is connected with the fourth isolation resistor through a signal line, and the other end of the sixth filter capacitor is grounded through the signal line; one end of the seventh filter capacitor is connected with the second current-limiting resistor through a signal line, and the other end of the seventh filter capacitor is grounded through the signal line; the second radio frequency matching resistor is connected with the second high-frequency signal switching integrated chip through a signal wire, and the other end of the second radio frequency matching resistor is grounded through the signal wire.
As a further improvement of the present invention, the IN terminal of the first channel filter is connected to the RF4 of the first high frequency signal switching ic chip; the IN end of the second channel filter is connected with the RF1 of the second high-frequency signal switching integrated chip.
As a further improvement of the present invention, the RF C input terminal of the first high-frequency signal switching integrated chip is connected to the main input terminal.
As a further improvement of the present invention, the RF C output end of the second high-frequency signal switching integrated chip is connected to the total output end.
As the further improvement of the utility model, the multiband control circuit still includes that singlechip output 0, 1 signal are TX1, TX2, TX3, TX4, high-low signal TX1, TX2, TX3, TX4 is connected with singlechip IO respectively through the signal line and is realized four kinds of connected modes.
Compared with the prior art, the utility model possess following advantage: the utility model discloses can be used for present TV and broadcast signal to divide into by the frequency transmission of difference, in order to transmit in same system, when transmitting the terminal point, carry out the segmentation to the signal of transmission and handle. The television and the broadcast signals are separated, and the on-off of different frequencies is further controlled. The channel on demand function system of the set-top box can replace the original scrambling and descrambling processor.
The switching transmission of telecommunication, removal, broadcasting and TV signal, with three big signal hybrid transmission backs, transmit the terminal point after, divide into the signal of transmission telecommunication, remove, broadcasting and TV signal, what kind of transmission mode needs communicates with the front end server through the singlechip, realizes the smooth switch of three big signals.
The utility model can realize the sectional control only by a simple network communication; the multi-band switching radio frequency signal can be achieved, smooth switching signals can be achieved, signals can be switched without interruption, and the cost performance is high.
Drawings
Fig. 1 is a schematic diagram of the structural square frame of the present invention.
FIG. 2 is a connection diagram of components of the multi-band control circuit of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.
As shown in FIG. 1, the utility model provides a multi-band control circuit, it includes input signal, first channel filter, first radio frequency change over switch, second channel filter, second radio frequency change over switch and single chip microcomputer control circuit. The first radio frequency change-over switch is respectively connected with a first channel filter U1, a second channel filter U4 and a single chip microcomputer control circuit through signal lines, the first channel filter U1, the second channel filter U4 and the single chip microcomputer control circuit are respectively connected with a second radio frequency change-over switch through signal lines, and the second radio frequency change-over switch is connected with an output radio frequency signal line;
the IN end of the first channel filter U1 is connected with the RF4 of a first high-frequency signal switching integrated chip U2; the IN terminal of the second channel filter U4 is connected to the RF1 of the second HF signal switching IC U3. The RF C input end of the first high-frequency signal switching integrated chip U2 is connected with the general input end.
The RF C output end of the second high-frequency signal switching integrated chip U3 is connected with the general output end.
The input end of the first high-frequency signal switching integrated chip U2 of the first radio-frequency switch is connected with the input end signal RF IN, and the output end of the second high-frequency signal switching integrated chip U3 of the second radio-frequency switch is connected with the output end of the input end signal RF OUT.
The high-frequency signal to be transmitted enters the first high-frequency signal switching integrated chip U2 through the RF IN to carry out four-way switching, wherein one way is switched with the first radio frequency matching resistor R1, the stability of a high-frequency transmission system is not influenced when the signal is disconnected, system impedance matching is carried out, and other three ways of switches are respectively connected with the frequency required by people. How the first high-frequency signal switching integrated chip U2 realizes the switch switching function realizes control according to TX1 and TX2 input by the single chip microcomputer control circuit, and the specific implementation is as follows:
| output state | TX1 | TX2 |
| RFC to RF4 | 0 | 0 |
| RFC to RF3 | 1 | 1 |
| RFC to RF2 | 0 | 1 |
| RFC to RF1 | 1 | 0 |
As shown in fig. 2, the first high frequency signal switching ic chip U2 is connected to the first channel filter U1, the second channel filter U4 and the first high frequency signal switching ic chip U3 through signal lines, the first channel filter U1 is connected to the second high frequency signal switching ic chip U3 through a first matching inductor L1, and the second channel filter U4 is connected to the second high frequency signal switching ic chip U3 through a second matching inductor L2. The input high frequency signal enters the first channel filter U1 and the second channel filter U4 respectively, and is connected to the RF2 output of the first high frequency signal switching integrated chip U2 and the RF2 of the second high frequency signal switching integrated chip U3. The IN terminals of the first channel filter U1 and the second channel filter U4 are connected to the RF4 of the first high frequency signal switching integrated chip U2 and the RF1 of the second high frequency signal switching integrated chip U3, respectively.
The first radio frequency switch comprises a first high-frequency signal switching integrated chip U2, a first radio frequency matching resistor R1, a first current limiting resistor R2, a first filter capacitor C1, a second filter capacitor C2, a first isolation resistor R3, a second isolation resistor R6, a third filter capacitor C3 and a fifth filter capacitor C5. The first radio frequency matching resistor R1, the first current limiting resistor R2, the first isolation resistor R3 and the second isolation resistor R6 are respectively connected with the first high-frequency signal switching integrated chip U2 through signal lines; one end of each of the first filter capacitor C1 and the second filter capacitor C2 is connected to the first current limiting resistor R2, and the other end of each of the first filter capacitor C1 and the second filter capacitor C2 is grounded. One end of the third filter capacitor C3 is connected to the first isolation resistor R3, and the other end of the third filter capacitor C3 is grounded. One end of the fifth filter capacitor C5 is connected to the second isolation resistor R6, and the other end of the fifth filter capacitor C5 is grounded. The RF C input is connected to the total input.
The second radio frequency switch comprises a second high-frequency signal switching integrated chip U3, a fourth filter capacitor C4, a sixth filter capacitor C6, a seventh filter capacitor C7, a third isolation resistor R4, a fourth isolation resistor R5, a second current-limiting resistor R7 and a second radio frequency matching resistor R8; the third isolation resistor R4, the fourth isolation resistor R5, the second current limiting resistor R7 and the second radio frequency matching resistor R8 are respectively connected with a second high-frequency signal switching integrated chip U3 through signal lines, one end of the fourth filter capacitor C4 is connected with the third isolation resistor R4 through the signal lines, and the other end of the fourth filter capacitor C4 is grounded through the signal lines; one end of the sixth filter capacitor C6 is connected with a fourth isolation resistor R5 through a signal line, and the other end of the sixth filter capacitor C6 is grounded through the signal line; one end of the seventh filter capacitor C7 is connected with the second current limiting resistor R7 through a signal line, and the other end of the seventh filter capacitor C7 is grounded through the signal line; the second radio frequency matching resistor R8 is connected with a second high-frequency signal switching integrated chip U3 through a signal wire, and the other end of the second radio frequency matching resistor R8 is grounded through the signal wire. The RF C output end is connected with the total output end. Wherein the switching function of the second high frequency signal switching integrated chip U3 is the same as that of the first high frequency signal switching integrated chip U2.
The multi-band control circuit further comprises a single chip microcomputer, wherein signals of 0 and 1 output by the single chip microcomputer are TX1, TX2, TX3 and TX4 respectively, high and low signals TX1, TX2, TX3 and TX4 are connected with I/O of the single chip microcomputer respectively through signal lines to achieve four connection modes, and the switching mode of high-frequency signals is achieved integrally. The utility model discloses can the multifrequency section switch radio frequency signal, realize smooth switching signal, can be uninterrupted and switch the signal, the sexual valence relative altitude.
Those of ordinary skill in the art will understand that: the above description is only for the specific embodiments of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A multi-band control circuit is characterized by comprising an input radio frequency signal, a first channel filter, a first radio frequency change-over switch, a second channel filter, a second radio frequency change-over switch and a single chip microcomputer control circuit; the first radio frequency change-over switch is respectively connected with the first channel filter, the second channel filter and the singlechip through signal lines in a control way, the first channel filter, the second channel filter and the singlechip are respectively connected with the second radio frequency change-over switch through signal lines, and the second radio frequency change-over switch is connected with an output radio frequency signal line;
the input end of a first high-frequency signal switching integrated chip U2 of the first radio-frequency switch is connected with the input end signal RF IN, and the output end of a second high-frequency signal switching integrated chip U3 of the second radio-frequency switch is connected with the output end of the input end signal RF OUT;
the radio frequency signal to be transmitted enters a first high-frequency signal switching integrated chip U2 through an RF IN for switching, wherein one path is switched with a first radio frequency matching resistor R1, and system impedance matching is carried out when the signal is disconnected; and the TX1 and TX2 input by the singlechip control circuit realize control.
2. The multiband control circuit of claim 1, wherein the first high frequency signal switching integrated chip U2 is connected to a first channel filter U1, a second channel filter U4 and a first high frequency signal switching integrated chip U3 through signal lines, respectively, the first channel filter U1 is connected to a second high frequency signal switching integrated chip U3 through a first matching inductor L1, and the second channel filter U4 is connected to a second high frequency signal switching integrated chip U3 through a second matching inductor L2.
3. The multiband control circuit of claim 1, wherein the first rf switch comprises a first high frequency signal switching integrated chip U2, a first rf matching resistor R1, a first current limiting resistor R2, a first filter capacitor C1, a second filter capacitor C2, a first isolation resistor R3, a second isolation resistor R6, a third filter capacitor C3, a fifth filter capacitor C5; the first radio frequency matching resistor R1, the first current limiting resistor R2, the first isolation resistor R3 and the second isolation resistor R6 are respectively connected with the first high-frequency signal switching integrated chip U2 through signal lines; one end of each of the first filter capacitor C1 and the second filter capacitor C2 is connected with a first current limiting resistor R2, and the other end of each of the first filter capacitor C1 and the second filter capacitor C2 is grounded;
one end of the third filter capacitor C3 is connected with the first isolation resistor R3, and the other end of the third filter capacitor C3 is grounded; one end of the fifth filter capacitor C5 is connected to the second isolation resistor R6, and the other end of the fifth filter capacitor C5 is grounded.
4. The multiband control circuit of claim 1, wherein the second RF switch comprises a second high frequency signal switching integrated chip U3, a fourth filter capacitor C4, a sixth filter capacitor C6, a seventh filter capacitor C7, a third isolation resistor R4, a fourth isolation resistor R5, a second current limiting resistor R7, and a second RF matching resistor R8; the third isolation resistor R4, the fourth isolation resistor R5, the second current limiting resistor R7 and the second radio frequency matching resistor R8 are respectively connected with a second high-frequency signal switching integrated chip U3 through signal lines, one end of the fourth filter capacitor C4 is connected with the third isolation resistor R4 through the signal lines, and the other end of the fourth filter capacitor C4 is grounded through the signal lines; one end of the sixth filter capacitor C6 is connected with a fourth isolation resistor R5 through a signal line, and the other end of the sixth filter capacitor C6 is grounded through the signal line; one end of the seventh filter capacitor C7 is connected with the second current limiting resistor R7 through a signal line, and the other end of the seventh filter capacitor C7 is grounded through the signal line; the second radio frequency matching resistor R8 is connected with a second high-frequency signal switching integrated chip U3 through a signal wire, and the other end of the second radio frequency matching resistor R8 is grounded through the signal wire.
5. The multiband control circuit of claim 2, wherein the IN terminal of the first channel filter U1 is connected to RF4 of the first high frequency signal switching integrated chip U2; the IN terminal of the second channel filter U4 is connected to the RF1 of the second HF signal switching IC U3.
6. The multiband control circuit of claim 2, wherein the RF C input terminal of the first high frequency signal switching IC chip U2 is connected to the common input terminal.
7. The multiband control circuit of claim 2, wherein the RF C output terminal of the second high frequency signal switching IC chip U3 is connected to the total output terminal.
8. The multi-band control circuit of claim 2, further comprising four connection modes, wherein the signals of 0 and 1 output by the single chip microcomputer are TX1, TX2, TX3 and TX4, and the high and low signals TX1, TX2, TX3 and TX4 are connected to the I/O of the single chip microcomputer through signal lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023263464.1U CN213754504U (en) | 2020-12-29 | 2020-12-29 | Multi-frequency band control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023263464.1U CN213754504U (en) | 2020-12-29 | 2020-12-29 | Multi-frequency band control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213754504U true CN213754504U (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023263464.1U Active CN213754504U (en) | 2020-12-29 | 2020-12-29 | Multi-frequency band control circuit |
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|---|---|
| CN (1) | CN213754504U (en) |
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