CN209001923U - A kind of logical signal gating circuit based on door - Google Patents
A kind of logical signal gating circuit based on door Download PDFInfo
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- CN209001923U CN209001923U CN201822105296.XU CN201822105296U CN209001923U CN 209001923 U CN209001923 U CN 209001923U CN 201822105296 U CN201822105296 U CN 201822105296U CN 209001923 U CN209001923 U CN 209001923U
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Abstract
A kind of logical signal gating circuit based on door, including input terminal, control terminal, the first output end, second output terminal, switching tube, first and door, second and door, periphery resistance and power supply；Input terminal is connect with first with the second input pin of door and second with the second input pin of door respectively；Control terminal is connect with first with the first input pin of door；The control electrode of switching tube is connect with control terminal, and another the two poles of the earth of switching tube are connected between power supply and ground after connecting with a first resistor, has common node between first resistor and switching tube；Described second connect with the first input pin of door with the common node；First connect with the output pin of door with the first output end, and second connect with the output pin of door with second output terminal.Due to constituting logical signal gating circuit by switching tube, with the common component such as door, so that the circuit of the application has advantage at low cost, and there is good application flexibility.
Description
Technical field
This application involves a kind of logical signal gating circuits based on door.
Background technique
Existing signal gating mainly uses signal gating chip, have it is at high cost, using inflexible defect.
Summary of the invention
The application provides a kind of logical signal gating circuit at low cost based on door.
According in a first aspect, provide a kind of logical signal gating circuit based on door in a kind of embodiment, including input
End, control terminal, the first output end, second output terminal, switching tube, first and door, second and door, periphery resistance and power supply；Institute
It states first and respectively includes the first input pin, the second input pin and output pin with door with door and second；Input terminal is respectively with first
It is connect with the second input pin of door and second with the second input pin of door；Control terminal is connect with first with the first input pin of door；
The control electrode of switching tube is connect with control terminal, and another the two poles of the earth of switching tube are connected to power supply and ground after connecting with a first resistor
Between, there is common node between first resistor and switching tube；Described second connects with the first input pin of door and the common node
It connects；First connect with the output pin of door with the first output end, and second connect with the output pin of door with second output terminal.
Preferably, the switching tube is NPN type triode, and the emitter of switching tube is grounded, the collector of switching tube and institute
State the first common node connection.
Preferably, the switching tube is NMOS tube, and the source electrode of switching tube is grounded, described in the drain electrode of switching tube and described first
Common node connection.
It preferably, further include second resistance, the second resistance is connected between control terminal and the control electrode of switching tube.
According to above-described embodiment based on the logical signal gating circuit with door, due to common by switching tube and door etc.
Component constitutes logical signal gating circuit, so that the circuit of the application has advantage at low cost, and has and answers well
Use flexibility.
Detailed description of the invention
Fig. 1 is one embodiment circuit diagram of the application.
Specific embodiment
Below by specific embodiment combination attached drawing, invention is further described in detail.Wherein different embodiments
Middle similar component uses associated similar element numbers.In the following embodiments, many datail descriptions be in order to
The application is better understood.However, those skilled in the art can recognize without lifting an eyebrow, part of feature
It is dispensed, or can be substituted by other elements, material, method in varied situations.In some cases, this Shen
Please it is relevant it is some operation there is no in the description show or describe, this is the core in order to avoid the application by mistake
More descriptions are flooded, and to those skilled in the art, these relevant operations, which are described in detail, not to be necessary, they
Relevant operation can be completely understood according to the general technology knowledge of description and this field in specification.
It is herein component institute serialization number itself, such as " first ", " second " etc., is only used for distinguishing described object,
Without any sequence or art-recognized meanings.And " connection ", " connection " described in the application, unless otherwise instructed, include directly and
It is indirectly connected with (connection).
Referring to FIG. 1, volume signal gating circuit.
According in a first aspect, provide a kind of logical signal gating circuit based on door in a kind of embodiment, including input
End Din, control terminal CTL, the first output end Dout1, second output terminal Dout2, switching tube Q1, first and door U1, second and door
U2, periphery resistance and power supply VCC；First with door U1 and second and door U2 respectively include the first input pin, the second input pin with
And output pin.Input terminal Din is connect with first with the second input pin 2 and second of door U1 with the second input pin 5 of door U2 respectively；
Control terminal CTL is connect with first with the first input pin 1 of door U1；The control electrode of switching tube Q1 passes through second resistance R2 and control terminal
The collector of CTL connection, switching tube Q1 emitter ground connection, switching tube Q1 is connect by first resistor R1 with power supply VCC, the first electricity
Hindering has common node 7 between R1 and the collector of switching tube Q1；Second the first input pin 4 and the company of common node 7 with door U2
It connects；First connect with the output pin 3 of door U1 with the first output end Dout1, the output pin 6 and second output terminal of second and door U2
Dout2 connection.
The working principle of the application is illustrated below.
When the gate control signal of control terminal CTL is high level, the first output end Dout1 is corresponding with door U1 input pin
Input is logic 1 on 1；Control terminal CTL high level, switching tube Q1 conducting, the level of common node 7 are pulled low, and Dout2 is corresponding
It is logical zero with input on door input pin 4.The logical signal of Din input is strobed into Dout1, and Dout2 is shielded.
When the gate control signal of control terminal CTL is low level, Dout1 is corresponding to be with input on door U1 input pin 1
Logical zero；Control terminal CTL low level, switching tube Q1 cut-off, the level of common node 7 are high level, and Dout2 is corresponding with door U2
Input is logic 1 on input pin 4.The logical signal of Din input is strobed into Dout2, and Dout1 is shielded.
Above-described embodiment switching tube uses NPN type triode, and in other embodiments, switching tube can also use NMOS
Pipe, switching tube are NMOS tube, and the source electrode of switching tube is grounded, and the drain electrode of switching tube is connect with the described first common node, no
Influence the realization of the application.
Use above specific case is illustrated the present invention, is merely used to help understand the present invention, not to limit
The system present invention.For those skilled in the art, according to the thought of the present invention, can also make several simple
It deduces, deform or replaces.
Claims (4)
1. a kind of logical signal gating circuit based on door, which is characterized in that including input terminal, control terminal, the first output end,
Second output terminal, switching tube, first and door, second and door, periphery resistance and power supply；Described first divides with door and second with door
It Bao Kuo not the first input pin, the second input pin and output pin；Input terminal respectively with first and the second input pin and second of door
It is connect with the second input pin of door；Control terminal is connect with first with the first input pin of door；The control electrode and control terminal of switching tube
Connection, another the two poles of the earth of switching tube are connected between power supply and ground after connecting with a first resistor, between first resistor and switching tube
With common node；Described second connect with the first input pin of door with the common node；First with the output pin of door and the
The connection of one output end, second connect with the output pin of door with second output terminal.
2. as described in claim 1 based on the logical signal gating circuit with door, which is characterized in that the switching tube is NPN
Type triode, the emitter ground connection of switching tube, the collector of switching tube are connect with the described first common node.
3. as described in claim 1 based on the logical signal gating circuit with door, which is characterized in that the switching tube is NMOS
Pipe, the source electrode ground connection of switching tube, the drain electrode of switching tube are connect with the described first common node.
4. as described in claim 1 based on the logical signal gating circuit with door, which is characterized in that it further include second resistance,
The second resistance is connected between control terminal and the control electrode of switching tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822105296.XU CN209001923U (en) | 2018-12-15 | 2018-12-15 | A kind of logical signal gating circuit based on door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822105296.XU CN209001923U (en) | 2018-12-15 | 2018-12-15 | A kind of logical signal gating circuit based on door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209001923U true CN209001923U (en) | 2019-06-18 |
Family
ID=66808849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822105296.XU Active CN209001923U (en) | 2018-12-15 | 2018-12-15 | A kind of logical signal gating circuit based on door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209001923U (en) |
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2018
- 2018-12-15 CN CN201822105296.XU patent/CN209001923U/en active Active
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