CN211123701U - Four-channel time constant control circuit - Google Patents
Four-channel time constant control circuit Download PDFInfo
- Publication number
- CN211123701U CN211123701U CN201922425231.8U CN201922425231U CN211123701U CN 211123701 U CN211123701 U CN 211123701U CN 201922425231 U CN201922425231 U CN 201922425231U CN 211123701 U CN211123701 U CN 211123701U
- Authority
- CN
- China
- Prior art keywords
- pin
- circuit
- capacitor
- time constant
- control circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Electronic Switches (AREA)
Abstract
The utility model discloses a four-channel time constant control circuit, including multiplexer chip U2, singlechip U1 and RC circuit, multiplexer chip U2 includes pin S1, S2, S3, S4, pin S1, S2, S3, S4 form four ways output channel with RC circuit connection respectively, still include 3 control signal input end pins A1, A0 and enable end EN, pin A1, A0 and EN are connected with the control signal output end pin on the singlechip U1 respectively, and singlechip U1 controls four ways output channel 'S break-make, the free choice four ways output channel, still is provided with control circuit' S input pin IN on the multiplexer chip U2. The utility model discloses a singlechip U1 control multiplexer chip U2 four ways output channel's break-make to through the resistance value that sets up in the RC circuit, control signal's time constant accurately.
Description
Technical Field
The utility model relates to a time constant control module field, concretely relates to four-channel time constant control circuit.
Background
With the wide application of automatic gain control in receivers, recorders, signal acquisition systems, radars, broadcasting, and even in wireless communication, fiber-optic communication, satellite communication, and other communication systems, the channel time constant control module has also developed at a high speed, and is generally a single-channel time control module in the market, where one module can only control one time constant, and the number of the multi-channel time constant control modules is very small.
Disclosure of Invention
The utility model aims to provide a: a four-channel time constant control circuit is provided, which has four output channels to control a plurality of time constants, and achieves the time constant of a free control signal by setting the resistance value of a resistor in an RC circuit in advance.
The utility model adopts the technical scheme as follows:
the utility model relates to a four-channel time constant control circuit, including multiplexer chip U2, singlechip U1 and RC circuit, multiplexer chip U2 includes pin S1, S2, S3, S4, pin S1, S2, S3, S4 form four ways output channel with RC circuit connection respectively, still include 3 control signal input end pins A1, A0 and enable end EN, pin A1, A0 and EN are connected with the control signal output terminal pin on the singlechip U1 respectively, and singlechip U1 controls four ways output channel 'S break-make, the free choice four ways output channel, still is provided with control circuit' S input pin IN on the multiplexer chip U2.
Further, the RC circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a capacitor C3, and a capacitor C4, the pins S1, S2, S3, and S4 are respectively connected to the output terminal of the control circuit through the resistor R1, the resistor R2, the resistor R3, and the resistor R4, and one end of the capacitor C1, the capacitor C2, the capacitor C3, and the capacitor C4 is connected to the output terminal of the control circuit, and the other end is grounded.
Further, when the enable end EN of the multiplexer chip U2 is set to 0, the chip does not operate, and the four output channels are closed; the enable end EN of the multiplexer chip U2 is set to 1, one of the four output channels is open, and the other output channels are closed.
Further, the enable terminal EN of the multiplexer chip U2 is set to 1, and the pins a1 and a0 are set to 0, so that the output channel of the pin S1 connected to the RC circuit is opened, and the other three output channels are closed.
Furthermore, the enable terminal EN of the multiplexer chip U2 is set to 1, the pin a1 is set to 0, and the pin a0 is set to 1, so that the output channel of the pin S2 connected to the RC circuit is opened, and the other three output channels are closed.
Further, the enable terminal EN of the multiplexer chip U2 is set to 1, the pin a1 is set to 1, and the pin a0 is set to 0, so that the output channel of the pin S3 connected to the RC circuit is opened, and the other three output channels are closed.
Furthermore, the enable terminal EN of the multiplexer chip U2 is set to 1, and the pins a1 and a0 are set to 1, so that the output channel of the pin S4 connected to the RC circuit is opened, and the other three output channels are closed.
To sum up, four ways of output of multiplexer chip U2 all connect the RC circuit to charge, form four ways of output channel, the input signal passes through the four ways of output channel break-make of singlechip U1 control multiplexer chip U2, through the resistance size of resistance in the RC circuit of setting in advance, change the charge time of RC circuit, thereby reach the time constant of control signal accurately, after selecting the output channel, the signal gets into the RC circuit and charges, resistance is bigger in the RC circuit, the charge time is longer, and then make the time constant of output signal longer.
Due to the adoption of the technical scheme, the beneficial effects of the utility model are that:
1. the utility model relates to a four-channel time constant control circuit connects multiplexer chip U2's pin A1, A0 and enable end EN through singlechip U1 to control multiplexer chip U2 four ways output channel's break-make.
2. The utility model relates to a four passageway time constant control circuit reaches the time constant of free control signal through the resistance value that sets up in the RC circuit in advance.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, for those skilled in the art, other related drawings can be obtained according to the drawings without creative efforts, and the proportional relationship of each component in the drawings in the present specification does not represent the proportional relationship in the actual material selection design, and is only a schematic diagram of the structure or the position, in which:
fig. 1 is a schematic diagram of the circuit structure of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
The present invention will be described in detail with reference to fig. 1.
Example one
As shown IN fig. 1, the utility model relates to a four-channel time constant control circuit, including multiplexer chip U2, singlechip U1 and RC circuit, multiplexer chip U2 includes pin S1, S2, S3, S4, pin S1, S2, S3, S4 form four ways output channel with RC circuit connection respectively, still include 3 control signal input part pins A1, A0 and enable end EN, pin A1, A0 and EN are connected with the control signal output part pin on the singlechip U1 respectively, and singlechip U1 controls the break-make of four ways output channel, the free choice four ways output channel, still is provided with control circuit' S input pin IN on the multiplexer chip U2.
In this embodiment, the model of the single chip microcomputer U1 is C8051F310, and the model of the multiplexer chip U2 is adg 804.
Example two
The embodiment is to further explain the present invention.
As shown in fig. 1, in this embodiment, based on the first embodiment, the RC circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a capacitor C3, and a capacitor C4, the pins S1, S2, S3, and S4 are respectively connected to the output terminal of the control circuit through the resistor R1, the resistor R2, the resistor R3, and the resistor R4, and one end of the capacitor C1, the capacitor C2, the capacitor C3, and the capacitor C4 is connected to the output terminal of the control circuit, and the other end is grounded.
EXAMPLE III
This embodiment is a further description of the present invention.
In this embodiment, on the basis of the above embodiment, when the enable end EN of the multiplexer chip U2 is set to 0, the chip does not operate, and the four output channels are closed; the enable end EN of the multiplexer chip U2 is set to 1, one of the four output channels is open, and the other output channels are closed.
Further, the enable terminal EN of the multiplexer chip U2 is set to 1, and the pins a1 and a0 are set to 0, so that the output channel of the pin S1 connected to the RC circuit is opened, and the other three output channels are closed.
Furthermore, the enable terminal EN of the multiplexer chip U2 is set to 1, the pin a1 is set to 0, and the pin a0 is set to 1, so that the output channel of the pin S2 connected to the RC circuit is opened, and the other three output channels are closed.
Further, the enable terminal EN of the multiplexer chip U2 is set to 1, the pin a1 is set to 1, and the pin a0 is set to 0, so that the output channel of the pin S3 connected to the RC circuit is opened, and the other three output channels are closed.
Furthermore, the enable terminal EN of the multiplexer chip U2 is set to 1, and the pins a1 and a0 are set to 1, so that the output channel of the pin S4 connected to the RC circuit is opened, and the other three output channels are closed.
In this embodiment, the truth table for the pins A1, A0 and the enable terminal EN is as follows:
| A1 | A0 | EN | ON Switch |
| x | x | 0 | None |
| 0 | 0 | 1 | S1 |
| 0 | 1 | 1 | |
| 1 | 0 | 1 | |
| 1 | 1 | 1 | S4 |
table 1: multiplexer chip U23 control terminal truth table
To sum up with the above embodiment, four outputs of the multiplexer chip U2 are all connected to the RC circuit for charging, to form four output channels, the input signal is connected to the four output channels of the multiplexer chip U2 through the single chip microcomputer U1, and the charging time of the RC circuit is changed by setting the resistance of the resistor in the RC circuit in advance, so as to precisely control the time constant of the signal.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can be covered within the protection scope of the present invention without the changes or substitutions conceived by the inventive work within the technical scope disclosed by the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.
Claims (7)
1. A four-channel time constant control circuit, characterized by: including multiplexer chip U2, singlechip U1 and RC circuit, multiplexer chip U2 includes pin S1, S2, S3, S4, pin S1, S2, S3, S4 form four ways output channel with RC circuit connection respectively, still include 3 control signal input end pins A1, A0 and enable end EN, pin A1, A0 and EN are connected with the control signal output terminal pin on the singlechip U1 respectively, and the break-make of four ways output channel is controlled to singlechip U1, the four ways output channel of free selection, still is provided with control circuit' S input pin IN on the multiplexer chip U2.
2. A four-channel time constant control circuit as claimed in claim 1, wherein: the RC circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a capacitor C3 and a capacitor C4, wherein pins S1, S2, S3 and S4 are respectively connected with the output end of the control circuit through the resistor R1, the resistor R2, the resistor R3 and the resistor R4, one end of each of the capacitor C1, the capacitor C2, the capacitor C3 and the capacitor C4 is connected with the output end of the control circuit, and the other end of each of the capacitor C1, the capacitor C2, the capacitor C3 and the capacitor.
3. A four-channel time constant control circuit as claimed in claim 2, wherein: when the enable end EN of the multiplexer chip U2 is set to 0, the chip does not work, and the four output channels are closed; the enable end EN of the multiplexer chip U2 is set to 1, one of the four output channels is open, and the other output channels are closed.
4. A four-channel time constant control circuit as claimed in claim 3, wherein: the enable end EN of the multiplexer chip U2 is set to 1, and the pins a1 and a0 are set to 0, so that the output channel of the pin S1 connected to the RC circuit is opened, and the other three output channels are closed.
5. A four-channel time constant control circuit as claimed in claim 3, wherein: the enable end EN of the multiplexer chip U2 is set to 1, the pin a1 is set to 0, and the pin a0 is set to 1, so that the output channel of the pin S2 connected to the RC circuit is opened, and the other three output channels are closed.
6. A four-channel time constant control circuit as claimed in claim 3, wherein: the enable end EN of the multiplexer chip U2 is set to 1, the pin a1 is set to 1, and the pin a0 is set to 0, so that the output channel of the pin S3 connected to the RC circuit is opened, and the other three output channels are closed.
7. A four-channel time constant control circuit as claimed in claim 3, wherein: the enable end EN of the multiplexer chip U2 is set to 1, and the pins a1 and a0 are set to 1, so that the output channel of the pin S4 connected to the RC circuit is opened, and the other three output channels are closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922425231.8U CN211123701U (en) | 2019-12-27 | 2019-12-27 | Four-channel time constant control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922425231.8U CN211123701U (en) | 2019-12-27 | 2019-12-27 | Four-channel time constant control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211123701U true CN211123701U (en) | 2020-07-28 |
Family
ID=71690987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922425231.8U Active CN211123701U (en) | 2019-12-27 | 2019-12-27 | Four-channel time constant control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211123701U (en) |
-
2019
- 2019-12-27 CN CN201922425231.8U patent/CN211123701U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE3743846C2 (en) | ||
| EP1639437A2 (en) | Modularl microelectronic-system for use in wearable electronics | |
| CN107238788B (en) | Touch chip test system based on matrix capacitor plate and test method thereof | |
| CN103177551A (en) | Data collection card having self calibration function and data collection apparatus | |
| EP1586164A1 (en) | Circuit arrangement for a capacitive proximity switch | |
| CN101521200B (en) | Semiconductor device and voltage divider circuit | |
| CN205123711U (en) | Analog -to -digital conversion chip volume production test circuit | |
| CN211123701U (en) | Four-channel time constant control circuit | |
| CN103455078B (en) | A kind of current-limiting circuit, device | |
| CN106501743A (en) | A kind of digital oscilloscope accuracy calibrating method and device | |
| DE102015107023A1 (en) | A voltage reference circuit | |
| CN113419589B (en) | Circuit parameter trimming method, trimming circuit, chip and electronic equipment | |
| DE3590263C2 (en) | ||
| CN103021467A (en) | Fault diagnosis circuit | |
| DE1541868C3 (en) | Tester for electronic components | |
| EP1399713B1 (en) | Transducer comprising connected data memory | |
| CN109686390A (en) | Differential voltage generator | |
| CN102708922B (en) | The method of adjustment of reference current, device and nonvolatile memory chip | |
| CN107210744B (en) | Connector element information detection | |
| US8476911B2 (en) | System and method for on-chip resistor calibration in semiconductor devices | |
| CN202648823U (en) | Single constant current source and multichannel thermal resistance measuring system | |
| CN108459184A (en) | A kind of current failure method for implanting and system | |
| DE19831600C1 (en) | Pressure sensor groups intactness assessment method | |
| CN111385023A (en) | Optical module debugging device and debugging method | |
| CN105702398A (en) | Rotary decimal fine-tuning resistance box |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |