TW550494B - Application specific integrated circuit (ASIC) of the electromagnetic-induction system - Google Patents

Abstract

The electromagnetic-induction system of the present invention comprises: a central processing unit (CPU); an application specific integrated circuit coupled with the central processing unit; a plurality of analogy switches that are coupled with the central processing unit and the application specific integrated circuit, individually; an antenna loop coupled with a plurality of analogy switches. The application specific integrated circuit further comprises: a digital filter that can reduce bandwidth error; a programmable gain amplifier that has the gain range with over eight-level; a latch device that can access the data at steady state; a multiplier and a divider that consist of hardware to increase the report rate; a programmable frequency generator can output the signal with the stable frequency.

Description

550494 V. Description of invention (1) 5-1 Field of invention:

The present invention relates to the electromagnetic sensor library 糸 4 ± ^ -tr ΚΆ JtK 4 4 system, and in particular to the special application of a lightning induction system. Integrated lightning failure < Λ 1. ^. 〇. ^ W 2. Application Specific

Integrated Circuit; ASIC) 〇5-2 Background of the Invention: As the handwriting recognition circuit is installed, the improvement of η is suitable for allowing the user to manually input f instead of the mouse, and the improvement of the recognition circuit device is more recent than a mouse. : 22: Handwriting to identify areas where the warrior does not care about the development of drama. The earliest 幵 user convenience, Tongdangya to replace _... to replace the mouse? Pen and tablet (to the left button of the breather. Although the traditional nib usually corresponds, and similar products have only been focused on drawing for two years, it's true. Apply the traditional electromagnetic induction system to find the first function A digital phase 4 — i: transducer / cursor device is provided. The public ", :: -r mouse or pen type mode, and the other: one type of operation mode <-one type is phase needle, and the other is Absolute mode. One fetching horse works relatively. When the mouse is in relative mode on the surface of the tablet system, the computer system receives 550494. V. Description of the invention (2) Rotation from sliding milk. Only A common technique is to develop a pair of vertical and horizontal movements that are perpendicular to each other. For example, a magnetic pen, a general standard device, and its movement to its support ^, its signal will change. Today, there are many The method uses the position on the surface of the board, which is an electromagnetic field induction technology. The identification of the relative change in the sliding surface is determined by the reaction on the absolute surface. A mouse uses an induction number in the milk in the X and γ directions. Signal pair 'Operation in the tablet system pair mode. The fake another position of the cursor device is new. The cursor device is applied to the absolute relative movement device in its promotion, and the cursor corresponding to the mouse is raised. Travel the absolute position of the computer system. Supported digital mode technology 550,494. 5. Description of the invention (3). Refer to the block diagram of the first figure. The vibration composed of electric digital t ab 1 makes the inductance larger if the vibration is large. From the side of the frequency change, there are also different changes in the capacitor oscillator (tablet also includes Amplifier). The central area of the board is arranged in an equidistant row. The board is only used to receive electromagnetic waves. A digital tablet (inductive capacitance (LC) produces a change in the amount of inductance, the greater the amount of change in the pressure of the pen tip, the greater the amount of force. The electromagnetic pen is engaged and separated to generate the inductive emission frequency, which is the key of the frequency. In addition, the digital tablet, Amplifier (This type of traditional handwriting circuit has both sides of the main use wave signal of the line circuit. When the electromagnetic pen magnetic waves, and through the digital As shown by ❿, it is a conventional electromagnetic magnetic induction device including: an electric et). The electromagnetic pen has a series of lines, and when it touches the pen tip, the oscillating frequency will change accordingly. The larger the change, the more oscillating The magnitude of the frequency is known to be applied to the tip of the pen to press two switch keys, and the pen's capacitance is changed by the change in the capacitance of the keys. The switch pressed by the user includes a detector (detector), an analog digital converter, etc. Component: It is an induction circuit, a unidirectional antenna that is inducted back. The electromagnetic emitted by this unidirectional sky electromagnetic pen, the unidirectional antenna will receive the electrical information to obtain relevant information. Generally speaking, due to the traditional The design of the electromagnetic induction device is limited by the number of components and cost-effectiveness. It can use a programmable amplifier with up to eight bands of gain, so the gain range of its band is only up to eight bands, that is, eight analog switches. According to the signal size of the electromagnetic pen, different gain values can be selected. When the signal entering the analog switch has a large amount of change, the gain range of only eight segments will make the signal easy to saturate and cause

Page 7 550494, Description of the invention (4) Microcontrollers that produce poor linearity usually use an adder and an electric induction device to generate unstable noses from the program output and increase the micro-control blow to the On the other hand, right, 'thus directly read the material, which caused the problem. In addition, the conventional electromagnetic induction device is designed with an adder and a subtractor to perform operations. Especially when low (Central Processing Unit; CPU) is used, the subtractor must simulate the operations of multiplication and division, thus reducing the reporting rate. In addition, the traditional electromagnetic induction device is a dream rate signal 'and transmitted to the antenna via an analog switch, this ^ output frequency' and causes the microcontroller (CPU) to continuously operate as (CP u) processing time, which leads to electromagnetic The pen relay rate 'makes the energy induced by the tablet unstable. For the traditional electromagnetic induction device, in order to reduce the cost, the data read by the frequency counter is unstable. As mentioned above, the design of electromagnetic induction devices for electronic components and scoops usually uses a large amount of force. The process cost is combined with the printed circuit board in the following way: Therefore, some functional components are: The space of the device is limited, and the function of the device.: == In which reduces the analog components of electromagnetic induction, & η "The design of electromagnetic induction devices requires many kinds of ~~ electromagnetic induction system", the present invention提 月 b The power of the electric induction device. Inch application integrated circuit to strengthen and increase

Object and summary of the invention

Page 8 550494

V. Description of the invention (5) In the above background of the invention, in order to strengthen the function of the response device, the present invention provides a special application of the electromagnetic induction and unified electromagnetic induction integrated circuit that can increase and improve the traditional electromagnetic penetration. The effectiveness of Feng Yizhi. Special application integrated circuits: special applications One object of the present invention is to provide integrated circuits. The present invention uses a valence body circuit (

The Application Specific Integrated Circuit combines a microcontroller (CPU) with a number of passive components, or: ASK). The device (CPU) is combined into a special application integrated circuit (As I c), which controls the number of electronic components. Therefore, the present invention can reduce the printing area to reduce the area of the hmted Clrcuit Board; PCB == (Shiya achieves the purpose of reducing the size of the product. For system maintenance, = Rishou, the special application of the invention Circuit (As 丨 c) σ /, to the product quality 'and easy and fast maintenance. Θ two :: to ensure the benefits and industrial applicability. Another month of this invention is economical The multiplier and divider composed of integrated circuits of special applications of the system are increased. In addition, the present invention uses a programmable output to continuously output a fixed frequency to maintain a fixed power, and makes it possible. According to this, the present invention can reduce Microcontroller multiplier and divider are combined in the electromagnetic (ASIC). The present invention uses a hardware plus microcontroller (CPU) to process a fast-footed frequency generator to stabilize the signal and make the electromagnetic pen suck and blow. The energy sensed by the tablet is very stable in the processing time of the CPU (CPU) and the &

Page 9 550494

Page ίο 5. Description of the invention (7) Generator: Signal. Programmable frequency 吝 Mouth and mouth, it is able to output 5-4 invention with stable frequency. Detailed description of the invention: The present invention is a + electromagnetic induction system. The special understanding of the present invention will be in the structural elements. Obviously, the special pieces familiar to the skilled person are not described in the details of the preferred embodiment of the present invention, and the scope of the present invention is not limited by the application of integrated circuits. In the following description, the process steps or details are described in order to thoroughly implement the present invention. In addition, Fang Ding: it is not limited to the circuit system to avoid causing the problem: well-known circuit elements will be described in detail Such as T s ^ Necessary restrictions. Can be widely applied / # ^ ^ k Ping preparation restrictions, until in other embodiments, 疋-subject to the scope of the subsequent patents. As shown in the figure, in the present The first embodiment of the invention [first to produce a secondary electric coffee, for example: one: = should system SIC) 2 2 0,4 inch special application integrated circuit (ASIC) 22 0 series and control sub-circuit 210 are quickly coupled, of which , Special Application Integrated Circuit (ASic) "ο includes Programmable Gain Amplifier (Programmable Gain Ampl if ier), a multiplier, a divider, a Programmable Frequency Generator, and a Pickup And 550494. V. Inventions Explanation (8) --v a digital filter; an analog switch group 2 3 0, an analog switch group 230 is connected to a control sub-circuit 2 1 〇 and a special application integrated circuit (As 丨 c) 2 2 〇. Electrical coupling; an antenna loop 24o, antenna loop 240 is electrically coupled with the analog switch group 230. The above-mentioned Programmable Gain

Ampl 1 f 1 er) has at least one gain range, and the number of analog switches of the analog switch group 23 is the same as the number of the plurality of gain ranges to control the antenna loop 2 4 Q and receive signals with a larger range of variation. In addition, the electromagnetic induction system 2 0 0 is a pick-up device through a special application integrated circuit (AS 丨 c) 2 2 0: the frequency data is taken, and the electromagnetic induction system 2 0 can control the secondary circuit 2} 〇 The programmable frequency generator of the special application integrated circuit (AS 丨 c) 2 2 0 generates a signal with a specific frequency, so that the antenna loop 240 can transmit the signal and maintain its specific frequency. x = As shown in the third figure, in the second embodiment of the present invention, the electromagnetic induction device 300 is firstly lifted, wherein the electromagnetic induction device 300 includes an electric 1000A and a digital tablet 300. B. The tablet 3 0 0B further includes: an antenna return, and the antenna loop 310 is used to receive the frequency signal emitted by the electromagnetic pen 3 0 0 A than the switch group 32 °, and the analog switch group 32 0 is coupled with the antenna circuit & amp In order to control the antenna circuit 31, the receiving or transmitting has a specific frequency, and the special system is electrically connected to the analog switch group. The method for forming the 脰 circuit (As 1C) 3 3 0 includes at least one.

Page 12 550494. V. Description of the invention (9) Complementary Metal Oxide Semiconductor (CM0S) manufacturing process, therefore, special application usiC) 33. There is no negative voltage generated, so it can save power to reduce the reference to I As shown in the third figure, in this embodiment, the above-mentioned body circuit uSIC) 330 further includes: a digital oscilloscope 3400 can filter the analog switch group 32. Noise transmitted; —: = Display amplification Is 35G 'Programmable gain amplifier 3 5Q can receive digital filtering &cry; 3-40 frequency signal transmitted and strengthen the frequency signal, where J: "35〇 has More than eight segments of multiple frequency signals with two W changes ... and the number of gain ranges is: ratio, there are two sets of ratio switches equal;-counter 36 and one tie;. Ten count state 3 6 0 can receive And calculate the frequency data, the counter 36. It is connected to receive the calculation by the counter 36, the second 5 can avoid the unstable output of the frequency data, and a multiplexer can be used.

Multlplexer; MUL) 370, multiplexer (MUL) 37〇 pass eight hitch 3 6 0, I would like to cry q β n 仏 your native know the knife don't accept 38. Contains a division signal;% / kg transmission signal, where 'Operator body circuit αίϋ Operator 380 can be integrated with special applications in special shore Λ electrical consumption, or the calculator 38 ° directly = special application The integrated circuit (ASIC) 33 ° internally, which can be safe: t degrees, and speed up the reporting rate of the tablet 3 0 0B;-Ke Cheng 4 said mouth generator 3 9 0, can protect the phase | J Spear King frequency production of the tenth flavor, the generation rate generation line 39〇 is used to generate a specific frequency to maintain this specific frequency, this ... The power transmitted back to the coffee can be fixed, while making the day == 55〇 494 [7 ------- V. Description of the invention ^-月 月 ii 月 匕 &, 疋 'a microcontroller (micr〇pr 〇cess〇runit) 5' microcontroller 3 9 5 series Receive the signals transmitted by the multiplexer (MUL) 370 and the programmable frequency generator 390 respectively. Referring to the fourth figure, in a third embodiment of the present invention, an electromagnetic induction device 400 is provided. The electromagnetic induction device 400 includes an electromagnetic pen 400A and a tablet 400B. . The digital tablet 4 0B further includes: an antenna circuit 405, which is used to receive the frequency signal transmitted by the electromagnetic pen 400A; an analog switch group 4 1 〇, an analog switch group 4 1 〇 and an antenna Loop 4 〇5 is electrically coupled to control the antenna loop 4 005 to receive or transmit with a frequency signal. Among them, the analog switch group 4 1 0 contains 64 analog switches; a special application integrated circuit (ASIC) 415, special The application integrated circuit (AS IC) 4 1 5 is electrically coupled to the analog switch group 4 1 0, wherein the method for forming the special application integrated circuit (AS IC) 4 1 5 includes at least a complementary metal oxide semiconductor ( Complementary Metal-Oxide Semiconductor (CM0S) manufacturing process. Therefore, the special application integrated circuit (AS IC) 4 15 does not generate negative voltage, which can save power to reduce costs; • a microcontroller 〇cess〇runit) 4 2 0, the micro-control industry 4 2 〇 through a two-way bus (Two-Way Bus) 4 2 5 and special application integrated circuit (AS IC) 4 1 5 and analog switch group 4 1 0 mutual electrical, microcontroller 42 0 can open the analog switch group 4 1 0 by tim-sharing and ° m u 11 i t a s k i n g 蛀 +1 +, 口 大 large line circuit 4 0 5.

550494 · V. Description of the invention (11) Referring to the fourth figure, in this embodiment, the above-mentioned special application integrated circuit (ASIC) 415 further includes: an amplifier 430, the amplifier 430 and the analog switch group 4 1 〇 Electrically coupled to receive signals transmitted by analog switch group 4 丨 〇; a digital filter 4 3 5 and a digital filter 4 3 5 receive amplifier

4 3 0 transmitted signal to filter noise; a programmable gain amplifier 4 4 0, a programmable gain amplifier 440 receives a digital filter 4 3 5 to transmit a signal to perform a signal gain process. Among them, a programmable gain amplifier The gain range of 4 4 0 includes 64 segments to process frequency signals with large changes; a rectifier (Recti fier) 445, which receives a programmable gain and amplifies the signal transmitted by 4 4 0 to form a direct current signal. ; A peak detector (Peak Detect 〇r) 4 5 0 'peak detector 4 5 〇 receives the DC signal transmitted by the rectifier 4 4 5 to obtain the peak value of the DC signal; an analog digital converter (Analog / Digital Converter; A / D Converter) 455, analog digital converter (A / D converter) 45 5 receives the peak value transmitted by the peak detector 450, and converts it into a digital signal, a shape circuit (Shaping ClrcUlt ) 4 6 0, the shaping circuit 46 0 receives the signal transmitted by the gain gain amplifier 440 to form a digital clock signal (Digital Clock), a counter 4 6 5 and a counter 4 65 • When digital transmission 60 closing plastic cap to calculate the frequency of the clock signal "bucket; Main

The picker 4 70 receives the frequency data transmitted by the counter 4 6 5 for stable output of specific data; a digital multiplexer (Digitai M ;: ltiPleXer; DMUL) 475; the digital multiplexer (DMUL) 475 can Receive specific data transmitted by the analog-to-digital converter 455 ^ n ^ ^, a multiplying digital tiger, a picker 470,; normal state 48 and a divider 48 5

P. 15 550494,

V. Description of the invention (12) Points: 425 ^^ via bidirectional t-bus: Same as: :: two-way multiplier 480 and divider-both 1 = two for special application integrated circuit (ASIC) 415 Middle 2 = Either of the two, then the other component can be remotely coupled by electrical coupling;: ;; Γ. ":) 415; a programmable frequency generation ^ 420" transmitted "is" born 49 "^ receives the microcontroller from the bi-directional bus 425, and loses Λ to generate a signal with a specific frequency. As described above, in the embodiment of the product two road τΑνΓ, the embodiment of the present invention can pass a special passive: "tunnel road (AS c)", a mouth-in-one microcontroller (cpu) and a plurality of moving pieces "or It is a combination of micro-control p (cpu) body circuit (ASIC) μ to reduce J: iCPU) for special applications. Jieming can reduce the number of printed circuit boards (: two sub-components. ®This: This product has reached a reduction in product size "The area of 乂 is 'reduced in production man-hours' and it is necessary to use the furnace of the present invention. Furthermore, for system maintenance, it is only economical to ensure that the product can be tested by using the integrated circuit (AS IC). Benefits [3] Easy and fast. Therefore, the present invention is consistent with the availability of the system. Although the second and the present invention, in addition to t, increase the processing speed of the microcontroller and reduce components

It can be used in any electromagnetic induction system with special criminals. It can also be used in the system. In addition, this document ^ Ming f uses the integrated circuit (ASIC) electromagnetic induction system to digitalize the function of the tablet ^ +, wrong by the special application integrated circuit (AS IC) to strengthen 550494. V. Description of the invention (13) Number In order to meet the cost, so far, it has not been developed for electromagnetic induction systems. Obviously, according to the description in the above embodiment, the present invention may have many modifications and differences. Therefore, it needs to be understood within the scope of the appended claims. In addition to the above detailed description, the present invention can be widely implemented in other embodiments.

The above are merely preferred embodiments of the present invention, and are not intended to limit the scope of patent application for the present invention; all other equivalent changes or modifications made without departing from the spirit disclosed by the present invention should be included in the following application patents Within range.

Page 17 550494. The diagram is briefly explained. The first diagram is a circuit block diagram of a conventional conventional electromagnetic electromagnetic induction device. The second diagram is a circuit of an electromagnetic induction system according to the first preferred embodiment of the present invention. Block diagram; The third diagram is a schematic diagram of a circuit of an electromagnetic induction system according to a second preferred embodiment of the present invention; and the fourth diagram is an electromagnetic diagram of a second preferred embodiment according to the present invention. Circuit block diagram of the induction system. Symbols of the main parts: 2 0 0 electromagnetic induction system 210 control sub-circuit 2 2 0 special application integrated circuit 2 3 0 analog on ‘off group 24 0 antenna loop

3 0 0 electromagnetic induction device 3 0 0 A electromagnetic pen 3 0 0 B tablet 310 antenna circuit 3 2 0 analog switch group

Page 18 550494 Simple diagram 330 Special application integrated circuit 340 Digital filter 350 Programmable gain amplifier 360 Counter 370 Multiplexer 375 Coupler 380 Operator 390 Programmable frequency generator 395 Microcontroller 400 Electromagnetic induction device 4 0 0A electromagnetic pen 4 0 0B digital tablet 405 antenna loop 410 analog switch group 415 special application integrated circuit 420 microcontroller 425 bidirectional bus 430 amplifier 435 digital filter 440 programmable gain amplifier 445 rectifier 450 crest detector 455 Analog-to-digital converter 460 shaping circuit

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Claims (1)

550494, VI. Patent application scope 1. An electromagnetic induction system 'The electromagnetic induction system includes: a first-time circuit, which can generate and transmit control signals, a second-time circuit, and the second-time circuit Receiving the control signal generated by the first circuit by means of coupling; an antenna loop, the second circuit controlling the antenna loop by means of coupling to transmit and receive electromagnetic wave energy having a specific frequency; and A third circuit, which transmits a signal with a specific frequency from the second circuit by means of coupling, and the third circuit and the first circuit transmit data to each other, where The secondary circuit generates a signal with a specific frequency according to the control signal generated by the first circuit. 2. The electromagnetic induction system described in item 1 of the patent application range, wherein the first circuit described above further includes a microcontroller. . 3. The electromagnetic induction system according to item 2 of the scope of patent application, wherein the above-mentioned microcontroller further includes a bidirectional bus, and the bidirectional bus is electrically coupled to the second circuit and the first circuit, respectively. 4. The electromagnetic induction system described in item 1 of the scope of patent application, wherein the second circuit mentioned above further includes an analog switch group. 5. The electromagnetic induction system according to item 1 of the scope of patent application, wherein the above Page 21, 550494 · 6. The third circuit in the scope of patent application further includes: a programmable gain amplifier, the programmable gain amplifier receives the signal transmitted by the second circuit in a coupled manner to perform a signal gain process; A counter that receives signals transmitted by the programmable gain amplifier in a coupled manner to calculate frequency data; a hitch that receives the frequency data transmitted by the counter in a coupled manner to facilitate Stably output specific data; and An arithmetic unit which can receive the signal transmitted by the first circuit in a coupled manner. 6. The electromagnetic induction system described in item 5 of the scope of patent application, wherein the gain range of the programmable gain amplifier is greater than about eight segments. 7. The electromagnetic induction system as described in item 5 of the scope of patent application, wherein the arithmetic unit further includes a multiplier. 8. The electromagnetic induction system described in item 5 of the scope of patent application, wherein the above-mentioned arithmetic unit further includes a divider. 9. An electromagnetic induction system 'The electromagnetic induction system includes an antenna circuit for transmitting and receiving electromagnetic waves having a specific frequency; an analog switch group, which is electrically coupled to the antenna circuit; Page 22 550494 t Sixth, the scope of patent application is a micro-control sub-circuit, which is electrically coupled with the analog switch group; and a first computing unit, the first computing unit receives by coupling A signal transmitted by the micro-control sub-circuit; a special-application integrated circuit, which is electrically coupled with the micro-control sub-circuit, the first arithmetic unit, and the analog switch group, respectively, wherein, the The special application integrated circuit further includes: a filter that receives the signals transmitted by the analog switch group by a coupling method; A gain amplifier that receives the signals transmitted by the wave filter by means of coupling; a second arithmetic unit that receives the signals transmitted by the micro-control sub-circuit by means of coupling; A frequency generator that receives a control signal transmitted by the micro-control sub-circuit by a coupling method to generate a specific frequency; a counter; and a hitch that is received by the coupling method The 'signal' transmitted by this counter. 10. The electromagnetic induction system according to item 9 of the scope of the patent application, wherein the above-mentioned micro-control sub-circuit further includes a bidirectional bus, and the micro-control sub-circuit is controlled by the bi-directional bus and the special application product respectively. The body circuit and the analog switch group are electrically coupled. Page 23 550494 6. Scope of patent application 11 · The electromagnetic induction system described in item 9 of the scope of patent application, wherein the first arithmetic unit further includes a divider. 1 2. The electromagnetic induction system according to item 11 of the scope of patent application, wherein the second arithmetic unit further includes a multiplier. 1 3. The electromagnetic induction system according to item 9 of the scope of patent application, wherein the first arithmetic unit further includes a multiplier. 14. The electromagnetic induction system according to item 11 of the scope of patent application, wherein the second arithmetic unit further includes a divider. 1 5. The electromagnetic induction system according to item 9 of the scope of patent application, wherein the manufacturing method of the special application integrated circuit described above includes a complementary metal oxide semiconductor manufacturing process. 16. The electromagnetic induction system according to item 9 of the scope of patent application, wherein the special application integrated circuit further includes a multiplexer. · 1 7. The electromagnetic induction system according to item 9 of the scope of the patent application, wherein the above-mentioned wave crossing device further comprises a digital wave crossing device. 1 8. The electromagnetic induction system according to item 9 of the scope of patent application, wherein the gain amplifier further includes a programmable gain amplifier. Page 24 550494 VI. Patent application scope 1 9. The electromagnetic induction system described in item 18 of the patent application scope, wherein the programmable gain amplifier includes at least eight gain ranges. 20. The electromagnetic induction system according to item 9 of the scope of patent application, wherein the frequency generator further includes a programmable frequency generator. 2 1. —Special application integrated circuit for electromagnetic induction system 'The special application integrated circuit for electromagnetic induction system includes: a digital filter that receives signals by means of coupling; A programmable gain amplifier, the programmable gain amplifier receiving a signal transmitted by the digital filter in a coupled manner; a first circuit, the first circuit receiving a transmission of the programmable gain amplifier in a coupled manner The signal is converted into a digital signal; a second circuit, the second circuit receives the signal transmitted by the programmable gain amplifier in a coupled manner to convert it into a digital clock signal A counter that receives the digital clock signal transmitted by the second circuit in a coupled manner to calculate frequency data; a hitch that receives the frequency data transmitted by the counter in a coupled manner ; At least one computing unit, which is electrically coupled to the electromagnetic induction system; and Page 25 550494 VI. Patent application scope A programmable frequency generator. The programmable frequency generator generates a signal with a specific frequency by means of coupling. 2 2. The special application integrated circuit for electromagnetic induction system according to item 21 of the scope of patent application, wherein the special application integrated circuit described above further includes a microcontroller. 2 3. The special application integrated circuit for electromagnetic induction system according to item 22 of the scope of patent application, wherein the above-mentioned microcontroller further includes a bidirectional bus. 2 4. The special application integrated circuit for electromagnetic induction systems as described in item 21 of the scope of patent application, wherein the special application integrated circuit described above further includes a digital multiplexer. The digital multiplexer may And electrically coupled to the first circuit, the second circuit, and the at least one computing unit, respectively. 2 5. The special application integrated circuit for electromagnetic induction system as described in item 21 of the scope of patent application, wherein the gain range of the programmable gain amplifier mentioned above further includes at least 64 segments. 2 6. The special application integrated circuit for an electromagnetic induction system as described in item 21 of the scope of the patent application, wherein the first-time circuit described above further includes: a rectifier that receives the Program the gain signal to form a DC signal; 550494 6. The scope of patent application is a crest detector. The crest detector receives the DC signal of the rectifier to obtain the peak value of the DC signal by the way of Imaho; and an analog digital converter, the analog digital converter receives the The peak value of the peak detector and converts it into the digital signal. 2 7. The integrated circuit for special application of electromagnetic induction system as described in item 21 of the scope of patent application, wherein the second circuit mentioned above further includes a shaping circuit, and the shaping circuit receives the coupling by a coupling method. The signal of the gain amplifier can be programmed to form a digital clock signal. 2 8 · The special application integrated circuit for electromagnetic induction system as described in item 21 of the scope of patent application, wherein at least one of the above arithmetic units further includes a multiplier. 2 9. The special application integrated circuit for electromagnetic induction system as described in item 28 of the scope of patent application, wherein the special application integrated circuit described above is electrically coupled with a divider. 30. The special application integrated circuit for electromagnetic induction system according to item 21 of the patent application scope, wherein at least one of the above-mentioned arithmetic units further includes the divider. 3 1. The special application integrated circuit for electromagnetic induction system as described in item 30 of the scope of patent application, wherein the special application integrated circuit described above and the multiplier Page 27 550494 Sixth, the scope of the patent application The device is electrically coupled. 3 2. —A special application integrated circuit for a digital tablet of an electromagnetic induction device, wherein the digital tablet has an antenna circuit and an analog switch group, and the special application of the digital tablet for an electromagnetic induction device The integrated circuit includes: an amplifier, the amplifier is electrically coupled with the analog switch group; a digital filter, the digital filter is electrically coupled with the amplifier; a programmable gain amplifier, the programmable gain amplifier and the digital The filter is electrically coupled; a rectifier, the rectifier and the programmable gain amplifier are electrically coupled with a peak detector, and the peak detector is electrically coupled with the rectifier; an analog digital converter, the analog digital converter and the peak The detector is electrically coupled; a shaping circuit is electrically coupled to the programmable gain amplifier; a counter is electrically coupled to the shaping circuit; a hitch is connected to the counter Electrical coupling; a digital multiplexer, which is electrically coupled to the analog digital converter and the anchor, respectively A multiplier electrically coupled to the digital multiplexer; a divider electrically coupled to the digital multiplexer; a microcontroller, the microcontroller and the analog switch group And the number Sixth, the scope of patent application The frequency generator of the program and the micro-controller Multiple positions: the device is electrically coupled; it is electrically coupled with the control system and the programmable cheek rate. Seat mouth digital; te's 4th patent scope of the patent application for electromagnetic induction device integrated package circuit, which is more than the switch group ... 64 less An analog switch. Q A • The special application integrated circuit for the position plate of the electromagnetic induction device as described in Item 32 of Shenyan's patent scope, wherein the special application integrated circuit described above is formed by a complementary metal oxide semiconductor process . 3 5 · The special application integrated circuit for the digital tablet as described in item 32 of the scope of patent application, wherein the programmable gain amplifier described above further includes at least 64 gain ranges. 3 6 · The special application integrated circuit for the digital tablet as described in item 32 of the scope of patent application, wherein the above-mentioned microcontroller further includes a bidirectional bus.