CN210007685U

CN210007685U - novel PIN switch driver

Info

Publication number: CN210007685U
Application number: CN201921210030.XU
Authority: CN
Inventors: 李业
Original assignee: Chengdu Anpuli Electronics Co Ltd
Current assignee: Chengdu Anpuli Electronics Co Ltd
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2020-01-31
Anticipated expiration: 2029-07-30

Abstract

The utility model discloses an novel PIN switch driver, including resistance R1, resistance R2, resistance R3, electric capacity C1, electric capacity C2, electric capacity C3, diode D1, triode Q1, triode Q2, pull-up power and pull-down power, solved the problem that current driver is bulky, with high costs and design complicacy.

Description

novel PIN switch driver

Technical Field

The utility model particularly relates to the field of wireless communication, concretely relates to novel PIN switch drivers.

Background

In a radio frequency signal processing module, different devices such as filters or amplifiers are generally required to be selected to be added into a circuit or different signal inputs or outputs are selected under different working states, and in this case, a radio frequency switch becomes a necessary device.

At present, radio frequency switches are roughly classified into three types: FET switches, PIN switches, electromechanical switches. The FET switch has the advantages of high switching speed, small volume and low power consumption, and has the defects of high loss, low power resistance and low isolation; the electromechanical switch has the advantages of high isolation, high power resistance and low loss, and has the disadvantages of low switching speed, large volume and high power consumption; PIN switches combine the advantages of two other switches: fast switching speed, small volume, low power consumption, high isolation, high power endurance and high isolation, but also has its own disadvantages: a driver is needed, the cost of the driver sometimes exceeds the cost of the PIN switch, and the switching speed is greatly influenced by the driver.

The traditional domestic driver is designed by combining a plurality of triodes, all elements are arranged in packages, in order to improve compatibility, a plurality of drivers are usually arranged in packages, and the driver can be used under the condition of multipath application, but the driver is large in size, high in cost and complex in design due to the design, and cannot meet the requirements in the situations with higher requirements on weight and size, such as aerospace and the like.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned not enough among the prior art, the utility model provides an kinds of novel PIN switch drivers have solved the problem that current driver is bulky, with high costs and design complicacy.

In order to achieve the purpose, the utility model adopts the technical scheme that novel PIN switch drivers comprise a resistor R1, a resistor R2, a resistor R3, a capacitor C1, a capacitor C2, a capacitor C3, a diode D1, a triode Q1, a triode Q2, a pull-up power supply and a pull-down power supply;

an emitter of the transistor Q1 is connected to an terminal of the resistor R1, an terminal of the capacitor C1 and the pull-up power supply, respectively, another terminal of the capacitor C1 is grounded, a base of the transistor Q is connected to another terminal of the resistor R and serves as an input terminal IN of the novel PIN switch driver, a collector of the transistor Q is connected to a terminal of the resistor R , another terminal of the resistor R is connected to an anode of the diode D , a terminal of the resistor R and a base of the transistor Q , a cathode of the diode is connected to a terminal of the capacitor C and an emitter of the transistor Q and serves as an output terminal OUT of the novel PIN switch driver, a collector of the transistor Q is connected to the pull-down power supply, another terminal of the resistor R and a terminal of the capacitor C are grounded, respectively.

And , a pull-up power supply adopts a +5V power supply.

And , the pull-down power supply adopts a-5V power supply.

, the resistor R1 is a pull-up resistor with a resistance value ranging from 1K omega to 10K omega.

, the resistor R2 is a current limiting resistor with a resistance value ranging from 50 Ω -200 Ω.

, the resistor R3 is a pull-down resistor with a resistance value ranging from 1K omega to 10K omega.

And , the transistor Q1 is PNP transistor, and the package is SOT 23.

And , the transistor Q2 is PNP transistor, and the package is SOT 23.

The utility model has the advantages that: when the input terminal IN is at a low level, a voltage difference between an emitter and a base of the triode Q1 is 5V, the triode Q1 is turned on, a voltage value of a collector of the triode Q1 is 4.7V, and since a resistance value of the pull-down resistor R3 is far greater than that of the current-limiting resistor R2, a voltage value of an anode of the diode D1 is 4.7V, a cathode of the diode D1 is 4V, a base of the triode Q2 is 4.7V, an emitter of the triode Q2 is 4V, the triode Q2 is not turned on, an output voltage of the output terminal OUT is 4V, and the PIN switch is turned off.

When the input end IN is at a high level, the voltage difference between the emitter and the base of the triode Q1 is 0V, the triode Q1 is not conducted, the anode of the diode is-5V, the emitter of the triode Q2 is 0V, the voltage difference between the emitter and the base of the triode Q2 is 5V, the triode Q2 is conducted, the emitter of the triode Q2 is-4.7V, the output voltage of the output end OUT is-4.7V, and the PIN switch is turned on.

The utility model discloses a separator accomplishes opening and turn-off control to the PIN switch, and the triode all adopts SOT23 encapsulation, and it is little to occupy the PCB territory, has reduced the volume of driver, the utility model discloses circuit design is simple, control is convenient, the cost is reduced.

Drawings

Fig. 1 is a circuit diagram of novel PIN switch drivers.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes will be apparent to those skilled in the art as long as they are within the spirit and scope of the present invention as defined and defined by the appended claims, and is intended to be protected by the present invention.

As shown in fig. 1, novel PIN switch drivers include a resistor R1, a resistor R2, a resistor R3, a capacitor C1, a capacitor C2, a capacitor C3, a diode D1, a transistor Q1, a transistor Q2, a pull-up power supply and a pull-down power supply;

In this embodiment, the pull-up power supply adopts a +5V power supply, and the pull-down power supply adopts a-5V power supply;

the resistor R1 is a pull-up resistor, and the value range of the resistance value is 1K omega-10K omega;

the resistor R2 is a current-limiting resistor, and the value range of the resistance value is 50-200 omega;

the resistor R3 is a pull-down resistor, and the value range of the resistance value is 1K omega-10K omega;

the triode Q1 adopts a PNP triode, and the packaging of the triode is SOT 23;

the triode Q2 adopts a PNP triode, and the packaging of the triode is SOT 23;

Claims

The novel PIN switch driver is characterized by comprising a resistor R1, a resistor R2, a resistor R3, a capacitor C1, a capacitor C2, a capacitor C3, a diode D1, a triode Q1, a triode Q2, a pull-up power supply and a pull-down power supply;

an emitter of the transistor Q1 is connected to an terminal of the resistor R1, an terminal of the capacitor C1 and the pull-up power supply, respectively, another terminal of the capacitor C1 is grounded, a base of the transistor Q is connected to another terminal of the resistor R and serves as an input terminal IN of the novel PIN switch driver, a collector of the transistor Q is connected to a terminal of the resistor R , another terminal of the resistor R is connected to an anode of the diode D , a terminal of the resistor R and a base of the transistor Q , a cathode of the diode is connected to a terminal of the capacitor C and an emitter of the transistor Q and serves as an output terminal OUT of the novel PIN switch driver, a collector of the transistor Q is connected to the pull-down power supply, another terminal of the resistor R and a terminal of the capacitor C are grounded, respectively.
2. The novel PIN switch driver of claim 1, wherein the pull-up power supply is a +5V power supply.
3. The novel PIN switch driver of claim 1, wherein the pull-down power supply is a-5V power supply.
4. The novel PIN switch driver of claim 1, wherein the resistor R1 is a pull-up resistor having a resistance value ranging from 1K Ω to 10K Ω.
5. The novel PIN switch driver as claimed in claim 1, wherein the resistor R2 is a current limiting resistor, and the resistance value thereof ranges from 50 Ω -200 Ω.
6. The novel PIN switch driver of claim 1, wherein the resistor R3 is a pull-down resistor having a resistance value ranging from 1K Ω to 10K Ω.
7. The novel PIN switch driver of claim 1, wherein the transistor Q1 is a PNP transistor with a package selected from SOT 23.
8. The novel PIN switch driver of claim 1, wherein the transistor Q2 is a PNP transistor with a package selected from SOT 23.