CN2502464Y

CN2502464Y - Electronic switch for telephone

Info

Publication number: CN2502464Y
Application number: CN 01255482
Authority: CN
Inventors: 陈玩世; 黄林福
Original assignee: WANSHITONG MICROELECTRONIC CO Ltd GUANGDONG PROV
Current assignee: WANSHITONG MICROELECTRONIC CO Ltd GUANGDONG PROV
Priority date: 2001-08-29
Filing date: 2001-08-29
Publication date: 2002-07-24
Anticipated expiration: 2011-08-29

Abstract

The utility model relates to the telephone technical field, in particular to an electronic switch for telephone, which comprises a button switch(9), a controller(8) and a switch circuit(7). The control input end and output end of the controller are respectively connected with the control ends of the button switch and the switch circuit, and the switch circuit is formed by the transistor switch circuit. The controller and the telephone integrated circuit IC 2 are in sharing, and using the 97 foot as the output end to be connected with the input end of the switch circuit, and using the R/T key in the telephone keyboard as the button switch. The utility model only need press the R/T key(use key) when taking telephone or hanging up the telephone. The utility model has the advantages that: the utility model is of a low cost, which prolongs the service life of the switch(station set) and improves speech quality.

Description

Phone dislodging organic electronic switch

(1) technical field: the utility model relates to the telephone set technical field, especially a kind of phone dislodging organic electronic switch.

(2) technical background: existing phone dislodging machine switch is installed in microphone park on the phone body, be the mechanical type switch hook, this switch series is connected to outside line lead-in input, as shown in Figure 2, its operation principle is: receiver is answered or when dialling, switch hook (SW1) " 1 " pin is connected to Q with " 3 " pin when mentioning ₁₁Base stage provides high potential to make Q ₁₁Conducting, thus make HKS (hook switch detection signal) work pin (IC ₂The 90th pin) becomes electronegative potential by high potential, IC ₂When detecting the HKS end this moment for electronegative potential, IC ₂Just can wake other control signal up, make telephone set in running order (being off hook state); When on-hook, switch hook " 2 " pin is connected with " 3 " pin, and " 1 " pin disconnects with " 3 " pin at this moment, because " 2 " pin is connected with " 3 " pin, makes Q ₁₁Base potential makes Q by high step-down ₁₁Become cut-off state by conducting state, the HKS signal also becomes high level by low level, IC ₂When detecting the HKS end this moment for high potential, IC ₂Just can export associated control signal, make telephone set be in holding state (being hook state).The weak point of mechanical type switch hook is: poor reliability easily causes noise, utters long and high-pitched sounds and influence speech quality, thereby influences the useful life of telephone set.

(3) summary of the invention: the purpose of this utility model is the weak point at existing telephone machine mechanical type switch hook, adopts the mechanical type switch hook on the electronic switch replacement existing telephone machine, to improve the speech quality and the useful life of telephone set.

The utility model is made up of push-button switch, controller and switching circuit, and the control input end of controller links to each other with the control end of push-button switch and switching circuit respectively with output.

The utility model, described switching circuit can be by transistor Q ₂, Q ₂₅, resistance R ₈, R ₁₁, R ₁₄And capacitor C ₁₀Form Q ₂₅Base stage link to each other collector electrode and Q with the output of controller ₂Base stage link to each other Q ₂Collector and emitter hold with " 1 " of outside line lead-in end and " 3 " respectively and link to each other R ₁₁And R ₁₄As Q ₂Base biasing resistor, R ₈As Q ₂Current-limiting resistance, C ₁₀Be connected to Q ₂Base stage and common ground between.

The utility model, described controller can with the telephone set integrated circuit (IC) ₂Shared, utilize its 97 pin as output, series resistor R ₄₃Link to each other with the input of switching circuit afterwards; Utilize and IC ₂R/T key in the telephone keypad that links to each other is as push-button switch.

The utility model is because its controller can fully utilize the IC in the telephone set network ₂As long as increase corresponding program, just the function that has controller, push-button switch is set a certain key and is got final product in keyboard, switching circuit only needs two transistors and a small amount of cheap resistance just can meet design requirement, from cost, electronic switch is unlike mechanical switch hook height, and the effect of bringing is significant: 1, avoid owing to the noise that causes of mechanical switch hook, utter long and high-pitched sounds; 2, improve the reliability of switch; 3, prolong the useful life of switch (phone); 4, improve speech quality.

(4) description of drawings: Fig. 1 is a functional-block diagram of the present utility model; Fig. 2 is that existing machinery formula switch hook is applied to the electrical schematic diagram on the telephone set; Fig. 3 is that embodiment 1 is applied to the electrical schematic diagram on the telephone set; Fig. 4 is that embodiment 2 is applied to the electrical schematic diagram on the telephone set.

Among the figure, 7 is switching circuit, and 8 is controller, and 9 is push-button switch, IC ₂Model be WST-01, transistor Q ₂And Q ₂₅Model be respectively MPSA42 and 9014, resistance R ₈, R ₁₁, R ₁₄, R ₅Resistance be respectively 150k Ω, 4.7M Ω, 4.7M Ω, 33 Ω.

(5) embodiment:

Embodiment 1: with reference to Fig. 1 and Fig. 3, this phone dislodging organic electronic switch is made up of push-button switch 9, controller 8 and switching circuit 7.Described switching circuit is by transistor Q ₂, Q ₂₅, resistance R ₈, R ₁₁, R ₁₄And capacitor C ₁₀Form Q ₂₅Base stage link to each other collector electrode and Q with the output of controller ₂Base stage link to each other Q ₂Collective's electrode and emitter hold with " 1 " end of outside line lead-in and " 3 " respectively and link to each other R ₁₁And R ₁₄As Q ₂Base biasing resistor, R ₈As Q ₂Current-limiting resistance, C ₁₀Be connected to Q ₂Base stage and common ground between; Described controller and telephone set integrated circuit (IC) ₂Shared, utilize its 97 pin as output, series resistor R ₄₃Link to each other with the input of switching circuit afterwards, utilize and IC ₂R/T key in the telephone keypad that links to each other is as push-button switch.

Its operation principle is: in the time will answering or dial, only need click " R/T " button promptly uses key, IC ₂Just can make Q by 97 a pin output HS (receiver is carried the machine signal) signal ₂₅Become by conducting and to end, make Q ₂Q is given in conducting ₁₁Base stage provides high potential, makes Q ₁₁Conducting produces HKS (HKS becomes low level by high level this moment), works as IC ₂When detecting 90 pin and being low level, IC ₂To wake other control signal up, make phone in running order (off hook state); When wanting on-hook, only need click " R/T " button promptly uses key, IC ₂Just can make Q by HS signal of 97 pin output ₂₅By by becoming conducting, make Q ₂End to Q ₁₁Base stage provides electronegative potential, makes Q ₁₁By producing HKS (HKS becomes high level by low level this moment), work as IC ₂When detecting 90 pin and being high level, IC ₂To export associated control signal, and make phone be in holding state (hook state).

Embodiment 2: with reference to Fig. 4, this example is with the difference of embodiment 1: Q ₂Collector electrode be connected the outside line lead-in " 1 " end resistance R ₅Afterwards, because R ₅Resistance very little be 33 Ω, Q ₂Collector electrode is connected on R ₅Before or after be equivalent substantially for switching circuit, but R ₅The rear end is provided with one by ZD ₅, R ₁₅And R ₁₆The voltage stabilizing circuit of forming can guarantee Q ₂The stability of under cut-off state, working.All the other are all identical with embodiment 1, no longer repeat.

Claims

1, a kind of phone dislodging organic electronic switch, this switch can make outside line lead-in " 1 " end and " 3 " end " connection " and " disconnection ", it is characterized by: be made up of push-button switch (9), controller (8) and switching circuit (7), the control input end of controller links to each other with the control end of push-button switch and switching circuit respectively with output.

2, phone dislodging organic electronic switch according to claim 1, it is characterized by: described switching circuit is by transistor Q ₂, Q ₂₅, resistance R ₈, R ₁₁, R ₁₄And capacitor C ₁₀Form Q ₂₅Base stage link to each other collector electrode and Q with the output of controller ₂Base stage link to each other Q ₂Collector and emitter hold with " 1 " of outside line lead-in end and " 3 " respectively and link to each other R ₁₁And R ₁₄As Q ₂Base biasing resistor, R ₈As Q ₂Current-limiting resistance, C ₁₀Be connected to Q ₂Base stage and common ground between.

3, phone dislodging organic electronic switch according to claim 1 and 2, it is characterized by: described controller is by integrated circuit (IC) ₂Constitute its output 97 pin series resistor R ₄₃Link to each other with the input of switching circuit afterwards, with IC ₂" R/T " key in the telephone keypad that links to each other is as push-button switch.