TWI354882B - Circuit and process for power management - Google Patents

Description

Nine, invention description: [Technical field to which the invention belongs]

Year. Month.. Ma & is replacing the page.! The prefecture of the prefecture said that the management of the surface and the surface is pure, and it is used to manage the smuggling and production methods. [Prior Art] Power management in portable electronic reading such as portable computers, personal computers (PDAs), tablets, mobile phones, and wireless computer peripherals, etc., due to the requirement for longer battery replacement or charging. become more and more important. For example, for example, a squirrel or a _ recording track _ slab (material) device package = packet pool source, and provides a wireless data connection, such as infrared or send / receive piracy; ^ also effective Power management, the continuous operation of this wireless device will quickly sigh the limited battery power in the sigh 1 u electronic equipment is often in the power supply X reserve Ik% surface 'but in the strip time period is the space state . This provides an effective power management through the power meter of the Lai's amount of scales, and the replacement of the red battery between the energy-aged batteries, she increases the battery's shame. Motion sensing provides a way to measure the use of power management devices (eg, wireless mice). Motion sensing can be achieved only by the code wheel or photon of the Wei ball and phase _. In response to sensing that the mouse is moving, it will be sent to the domain (4). (4) M—thin (for example, 5 5 095136116 1003026744-0 1354882 ^~~jh—0-4-second) There is no right μ. The power-saving mode power management system of the page change enters the energy consumption and the signal processing speed is reduced. For a longer time interval (for example, after the _, the mouse is still in the middle, the slide & 1 source s can enter a lower sleep state. In the sleep state, the slippery two-two circuit is in the sleep state with the least power consumption. When it is detected that if the system enters the working state, and wakes up the signal processing circuit. Reason =:: If there is no movement for a long time (for example, 2° seconds), then the power management system and the system cut off the signal processing and management. System sorrow'. In the power-off state, there is a motion sensing circuit that is active and consumes power. Lidi = Sensing provides another way to detect the use of the mouse. For example, the US standard /1, · test The i-capacitor _ type power supply w, system, including the scoop capacitor (scoopcapacltor) and barrel potential connected to the source = _ UGket capamQr). #操作翻他/她的手/其他部部 = The mouse will become the other plate of the scoop capacitor when the mouse is pressed. Power Management ^ Selectively charge the scoop capacitor and the barrel capacitor. The charge-to-load transfer between the two capacitors changes the charge on the barrel-shaped electric grid in the case of fine-tuning the capacitance of the (10) capacitor, and compares the charge of the barrel-shaped capacitor with the threshold value to ensure that the crane is tattooed. Succession. Like the county _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ~ During the off state, the motion sensing or capacitive sensing circuit is the only device in the device 095136116 1003026744-0 13^4882

Made parts. For the (four) line mouse at the wheeler, the power consumption of the sensing circuit is critical to the device (for example, there is no prior art motion _ and _·). Μ(10) Micro's _, the motion sensing and capacitive sensing in the prior art are generally compatible with the power saving mode and the sleep mode that are expected to be outside the power mode and the sleep mode. In the power-saving mode or the sleep mode, the power supply is completely compliant. Therefore, in the power-saving or sleep mode, the response speed to the human command is faster than the shutdown mode. 敎 Realizing the device with the power supply management and the road For the purpose of solving the above problems, an electronic device (10) is provided for the purpose of solving the above problems when the tube, the road, and the device are short from the empty machine. ), having a power management circuit (20) that switches the device (1〇) in response to whether the user touches the device (1〇). The power management circuit (20) includes a dielectric housing (216) covered with a commission (1〇). a conductive plate (214). When the user touches the device 10), the user's body and the conductive plate (214) constitute a sensing capacitor (213). The sensing capacitor (213) and the reference capacitor (223) are periodically charged and discharged. The comparison circuit element (230) compares two electrodes 095136116 1003026744-0 7 1354882 ' ' ·' V ·· r · : l year ^^ change the container (213'223) _ electric dust, ask the user whether to touch the injury (10), and generate the device accordingly (1〇 The control signal of the opening is described. [Embodiment] Hereinafter, the present embodiment will be described with reference to the various embodiments. In the attached time, elements of similar structure or function are denoted by the same reference numerals throughout the _. The drawings are merely for the convenience of the description of the preferred embodiments of the present invention. They are not intended to be exhaustive or to limit the scope of the invention. A block diagram of the device w of the management circuit 2. The device 1G can be any kind of sub-device with power management capability (4). According to the present invention, if the Lai 1G is dependent on Wei Power, the circuit management circuit 2 is particularly useful. For that, Preparation of W may be a personal digital assistant ⑽), wireless remote control device, set # County-based audio, wireless data transfer process set up other injuries. In the specific embodiment of the present invention, the device 1G is described below in the computer's wireless mouse. The wireless mouse device includes a battery n and a resource component 12. Data Processing = The component 12 may include a digital signal processor, a digital analog converter, an analog digital radio frequency (RF) or an infrared (10) signal transmission receiver, and the like. The battery ^ provides energy for the operation of the processing 12 source management circuit 2 () and data processing components 095136116 8 1003026744-0

Li County issued __ management transfer 2G schematic. The power supply diagram has an output terminal 245 connected to the control terminal 14 (if not) of the data processing unit (4) in the device 1G. In response to whether the device 1 is being used, the original management circuit 2 generates a control signal on the output terminal 245 to switch the data processing unit 12 between the open state and the closed state, thereby maintaining the power efficiency of the device 1 〇 ▲ The power management circuit 20 includes a clock signal generator 2〇2. In accordance with the present invention, clock domain generator 202 can include any type of oscillating signal generator. For example, a resistor valley (RC) oscillator, a crystal oscillator, etc. can be used as the clock signal generator 2〇2. According to various embodiments of the present invention, the wording of the clock signal may range from a few kilohertz to several million mile. However, higher or lower clock signals are also included in the towel of the present invention. The _ signal of the m2Q2 is transmitted to the control terminals of the switches 212 and 222 in the power management circuit 20. In accordance with a preferred embodiment of the present invention, switches 212 and 222 are field effect transistor (10) or bipolar electrocrystalline (10)) clock domains are delivered to the gate electrode of the FET or the base electrode of the BJT. Switches 212 and 222 are connected in parallel with capacitors 213 and 223, respectively. Power Supply 095136116 9 1003026744-0 1354882 | D0: Year Month Day Correction Replacement Page -Tt Γ Circuit 20 also includes current source 211 butterfly. Electric ^^ and Sensing Electric Valley _ group (four). Similarly, current_ is connected in series with the parallel combination of switch 222 and electric valley 223. In the concrete case of the present invention, the currents generated by the current sources 211 and 221 are substantially equal to each other. When the opening and the opening 222 are turned on, the current sources m and 221 charge the capacitors 213 and 223, respectively. When switches 212 and 222 are closed, current from current sources 211 and 221 bypasses capacitors 213 and 223 to ground 205. In addition, the closed switches 212 and 2 do not discharge the capacitors 213 and 223. According to the present invention, the capacitor 213 of the power management circuit material senses whether the device 1 is being used. I. No. FIG. 2 shows that the capacitor 213 includes two plates 214 and 215. A conductor is used as the plate 214 of the capacitor 213, which is also referred to as a sensing plate. The physical structure of the power management circuit 2 只 includes only one of the plates 214 of the capacitor 213 and is injured. When the user is in use, the user's body functions as the other plate 215 of the capacitor 213. Fig. 3 schematically shows a part of the device 1 and shows the formation of the capacitor 213. Device 1 includes a dielectric layer 216 that covers and is in contact with plate 214 of capacitor 213. For example, dielectric layer 216 is the housing, housing, or portion of the housing of device 1(). The outer casing of the device may include materials of various faces, such as 'plastic, metal, etc.' but covering the outer casing portion of the sensing capacitor plate 214, that is, the dielectric layer 216 of FIG. 3, preferably made of an insulating dielectric material. . Plastics are commonly used materials for packaging equipment 10 due to their dielectric properties, price, and ease of making lions and colors. Fig. 3 shows a thief-viewing arbitrage in the form of a flat plate according to an embodiment of the present invention, 095136116 1003026744-0 10 1354882. Consumption. According to the present day and month, the sensing capacitor plate 2i4 of the capacitor 213 can have different shapes and sizes. Additionally, the plates 214 can include more than one conductor that are connected to each other. For example, the plates 214 can include one or more conductors that conform to the shape of the housing of the device 1(). When the user touches the surgery of the device 1 , a portion of the user's body, such as the finger not shown in Figure 3, is in contact with the outer casing of the cover (7) that covers the sensing capacitor plate 214. If the contact area overlaps with the dielectric layer 216 of the cover plate 214, this portion of the user's body will be used as the other plate addition for the capacitor. The other part of the user's body is used as ground 205 (see Figure 2). It should be noted that when the user touches the device 1 , the user's body functions as a _. According to the present invention, the scope of the user equipment 1G is not limited to the direct contact between the households (4) and the equipment 1〇. It is in contact with the dielectric layer 216 to contact any oblique electrical object and functions to sense the plate 215 in the capacitor 213. Returning to Fig. 2, the power management circuit 20 further includes a comparison mode, group 230 for comparing the voltage difference between the capacitors 213 and 223. In accordance with a preferred embodiment of the present invention, the comparison module 230 includes a differential amplifier 234. Capacitors 213 and 3 are connected to the first input terminal 231 and the second input terminal 232 of the differential amplifier 234, respectively. The output 235 of the differential amplifier 234 is coupled to the first plate of the capacitor jump (also referred to as the integrating capacitor). The second plate of capacitor Is 238 is coupled to ground 2 () 5 <> The first plate of the capacitor jump is also coupled to the first input of the comparator 230 of comparator 230. Comparator 095136110 1003026744-0 1354882

j. The second input of the month-Yang-Yang replacement page I 244 is connected for receiving the reference voltage 243. The output 比较 of the comparator 244 is used as an output of the comparison module 230 and is connected to the output terminal 245 of the power management circuit 2A. It should be > the structure of the comparison module 230 is not limited to the above and the case shown in Fig. 2. According to the present invention, the comparison module 23Q can be a Rens circuit 7L capable of comparing the voltage pulse signals on the input terminals 231 and 232 and generating a turn-out signal indicating a higher voltage pulse signal. In operation, the clock signal generator 2〇2 turns the switches 212 and 222 open and closed at a rate of the clock signal frequency. In accordance with a preferred embodiment of the present invention, the open and close states of switches 212 and 222 are substantially synchronized with each other. Therefore, the capacitors M3 and 223 are charged and discharged periodically and substantially simultaneously. The capacitance of the capacitor 213 (also referred to as the sensed state) changes depending on whether the device 1 is in contact with the user. On the other hand, the capacitance of the electric grid 223 (also referred to as a reference capacitor) is substantially constant. The comparison module compares the capacitances of the sense capacitor 213 and the reference capacitor 223 to generate a control js number after use of the green device 1 to switch the data processing element I? between the switch states accordingly. When the user does not touch the device 1G, the user's body (acting as the plate 215 of the capacitor 213 in Fig. 3) is away from the plate 214. In addition, the plate 215 is separated from the plate 214 by an air gap not only through the dielectric layer 216. Due to the low dielectric constant of the air, the capacitance of the sense capacitor 213 is much smaller than the capacitance of the reference capacitor. 12 095136116 1003026744-0 1354882 The rise in power at the input 231 of the clock phase phase 234 of switches 212 and 222 is faster than the input 232. In response to the higher power input (e.g., non-inverting input) at the input, differential amplifier 234 produces a high wing on output 235. During the phase of the clock signal at which switches 212 and 222 are turned off, the power on inputs 231 and 232 is returned to the grounded bunker level. Thus, differential amplifier 234 produces a high overshoot signal at output 235. The frequency of these pulses is equal to the high-voltage pulse signal from the differential amplification of the electric μ 213 and 223. Specifically, the high-voltage pulse on the output 235 of the differential amplifier is continuously The capacitor is charged to generate a high voltage at the first input of the comparator. The comparator compares the button on its first input to the reference voltage on its second input. In response to the input of the first = upper (eg, inverting input) (4) L, the upper comparator 244 generates a low voltage signal at the turn-out terminal of the power management circuit 2 (1). The low voltage signal (for example, two of 0) Carry value = material processing element 12 _ terminal 141 at the control bit zero 'data processing element 12 enters a shutdown state in which the power consumption is substantially 0. When a user touches the device 1 (), as shown in FIG. 3, the user's The body (acting as a capacitor 2 = plate 215) is in contact with the outer casing of the device 10 (serving as the electrical layer 216 in the capacitor 213) because the plate 215 is close to the plate 2H and the dielectric layer 216 has a dielectric constant of =. Therefore, the capacitance of the sensing capacitor is much larger than that of the capacitor when using the θ household without touching the device. 13 095136116 1003026744-0 1354882 LLf敝 (4) Buy ί Example 'When the user touches the loan 10, the sense The capacitance of the capacitor 223 of the capacitor 213 is measured. During the phase of the clock signal that the switches 212 and 222 are open, the voltage on the input 231 of the differential amplifier 234 rises more slowly than the input 2. In response to the lower input 231 Voltage (for example, non-inverting input), differential amplifier in the wheel A low voltage is generated across terminal 235. The electric lions on input terminals 231 and 232 return to ground voltage levels during the phase of the clock signal of switch 212 and (10). Thus 'differential amplifier 234 produces a low voltage pulse at output 235. The frequency of the pulse is equal to the frequency of the charging and discharging of the capacitors 213 and 223. The capacitor is integrated with the low voltage pulse signal from the differential amplification H 234. Specifically, the low voltage at the output 235 of the differential amplifier 234 The pulse continuously produces a low electrical history on the first input of the comparison H 244. The comparator 244 compares the voltage at its first input to its reference voltage on the second input. Responding to a voltage on the first input (eg, an inverting input) that is lower than a reference voltage 243 on the second input terminal (eg, a non-inverting input) comparator 244 is generated on output terminal 245 of power management circuit 20 High signal. The high-signal signal (for example, a binary value of 1) is transmitted to the control terminal 14' of the data processing component 12 (shown in Figure 1) and switches the data processing circuit 12 to the open and active state. Thus the device 10 is in a closed state when not in contact with the user. During the off state, the power management circuit 2 is the only component of the device 10 that consumes energy. The performance and power consumption of the power signal circuit 20 depends on the control switch 212 and 2 The frequency of the clock signal that does not charge and discharge the sensing capacitor 213 and the reference capacitor 223, respectively. High 14 095136116 1003026744-0

-L JJH-OOZ frequency usually gets high secrets two > Li month replacement page 时. Time power consumption according to the hair 3^ϊϊ^, the second rate range from a few hundred hertz to several million hertz. In the preferred implementation, Jian Tang suppresses this number at a frequency of several kilohertz. The clock signal generator 2G2 usually has a package of vibration, Τ> 0Γ t V σπτ * , soil 疋 β early resistance electric valley (RG) vibration H; 1 control vibration h, flow control f follower, crystal slitter Wait. In a preferred embodiment, clock signal generator 202 already includes such a chip rc oscillator due to the & Mip operator (10) single and power efficiency. The performance and power consumption of the galvanic circuit 20 also depends on the current source, the sense capacitor 213 and the reference capacitor 223, the differential amplification (4) 4, the integrating capacitor 238, the reference power, and the comparator. For example, the small capacitor integrated capacitor 238 has a short charge and discharge time, allowing the power management circuit 2 to have a fast response time. The small capacitor's integrating capacitor 238 also allows the power management circuit 2q to consume less power. Further, the 'high current power sources 211 and 221 will speed up the charging speed of the sensing capacitor 213 and the reference capacitor 223. In accordance with the present invention, the circuit designer can parameterize the various devices in circuit 20 to achieve the desired response time and performance. When the user is not in contact with the device 10, the capacitance of the sense capacitor 213 is substantially zero, functioning as the plate 215 in contact with the dielectric layer 216 as shown in FIG. When the user touches the device ίο, the capacitance of the sense capacitor 213 is determined by the thickness and dielectric constant of the dielectric layer 216 and the area of the plate 214. Dielectric layer 216 is typically made of a plastic material. In order for the body of the user to form the plate 215 of the sensing capacitor 213, the user 095136116 15 1003026744-0 1354882

By now, it should be appreciated that a circuit and method for efficiently managing electronic devices has been provided. According to the present invention, the function of the device is to open the function circuit in the device when the user touches the device, and the function circuit is turned off when the user does not touch the device. Therefore, the device is not in the off state. Compared with the existing power management circuit, the Wei management circuit has a simple structure, is fascinating, and has high power consumption. Because of its fast_should, it is generally not necessary for the power_road to have multiple power saving states, such as a standby state, a sleep state, a sleep state, and the like. Turning these two states on and off is enough to achieve efficient operation. When the device is not reading, the power management circuit is the only part of the device that is heterogeneous. According to the present source management, there is a small current in the range of, for example, a few microamps to several tens of microamperes. In the closed state, the Wei Rui of the equipment towel can be completely powered off, so that substantially no energy is consumed. Although a number of specific embodiments of the invention have been described above, they are not intended to limit the scope of the invention. Various modifications and variations of the described embodiments are apparent to those skilled in the art. For example, although the power supply tube method is described in the specification, the invention covers 16 095 136 116 1003026744-0 1354882 and various electronically arranged electric green crystals and (4). The same 7^^ energy circuit has two modes of opening and closing. This is not the secret of this (four) Wei Wei. Bribery The invention can have multiple states. Moreover, the power management circuits and methods described above are not limited to power management applications. According to the present invention, they can be easily modified and used as control circuits for other purposes, such as generating control signals for controlling the functions of the Weilu components.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a block diagram of an apparatus having a power management circuit according to the present invention. FIG. 2 shows a power supply according to the present invention, and FIG. 3 schematically shows a device of the present invention. Figure, and the formation of a sensing capacitor in the circuit. Knife, power supply tube according to the present invention [main element symbol description] 10 device 11 battery 12 data processing element 14 control terminal 20 power management circuit 202 clock signal generator 205 ground line 211 current source 212 switch 213 capacitor 17 095136116 1003026744 -0 1354882

IjQOr--1-.--2 4-f I year and month correction replacement page II 214 plate 215 plate 216 dielectric layer 221 current source 222 switch 223 reference capacitor 230 comparison module 231 first input 232 second Input 234 Differential Amplifier 235 Output 238 Capacitor 243 Reference Voltage 244 Comparator 245 Output Terminal 18 1003026744-0 095136116

Claims (1)

1354882 X. Applying for a patent garden 1. A control first current source for controlling a circuit component; a conductive plate connected to the first current source; a dielectric layer covering the conductive plate; a first switch, a first electrode connected to the conductive plate and a grounded first electrode; a second current source; a capacitor 'having a first electrode and a grounding electrode connected to the second current; and a second switch having a a first electrode connected to the first electrode of the capacitor and a second electrode connected to the second electrode of the capacitor; and a comparison module having a first wheel end connected to the conductive plate and the capacitor The first electrode faces the second input end and the output terminal connected to the control terminal of the circuit component. 2. The control circuit of claim i, wherein the first switch and the second switch have a control electrode coupled to receive a clock signal. 3. The control weave as described in the section above, wherein the user touches the dielectric layer and the conductive plate constitutes a sensing capacitor. 19 095136116 1003026744-0 pcTr^- 牟 is the self-correcting replacement page supplementary correction day W·卜# 营日1, please refer to the control weaving road described in item 1 The differential amplifier has a first input connected to the conductive plate and a second input connected to the first electrode of the capacitor; wherein the comparison module further includes a comparator, The comparator has a first input connected to the output of the differential amplifier, a first input coupled to the reference voltage level, and an output coupled to the output of the comparison module; The group also includes an integrating capacitor having a first plate connected to the output of the differential amplifier and a second plate being grounded. 5. The electronic device for controlling a control circuit of a circuit component according to any one of claims 1 to 4, comprising: a casing made of a dielectric material; Receiving a control terminal of the control signal, thereby switching the function circuit between the first state and the second state in response to the control signal; and the power management circuit comprising: a first current source and a second current source; conducting a plate located below at least a portion of the outer casing and coupled to the first current source; a capacitor coupled between the second current source and ground; a first switch 'connected between the conductive plate and ground 20 1354882 . a second switch, in parallel with the capacitor; a 'clock' pain occurrence apricot' is connected to the control electrode of the first and the second switch, and the second switch; and the comparison mode a group 'having a first input connected to the conductive plate, a second input connected to the electric junction, and an output connected to the control terminal of the functional circuit, the pin being the first input When the first voltage pulse on the terminal is on the second electrical test on the second wheel input end, the comparison module generates the first money, * when the material pulse is lower than the second voltage pulse A second control signal is generated. 6. The electronic design of claim 5, wherein: when the conductive object is in contact with the outer casing above the conductive plate, the electrical conductor and the conductive plate form a capacitance greater than a sensing capacitor of a capacitance of the capacitor; and when no conductive object is in contact with the outer casing over the conductive plate, the capacitance of the sensing capacitor is less than the capacitance of the capacitor. 7. The electronic device of claim 6, wherein: when the capacitance of the capacitance H is greater than the capacitance of the capacitor, the comparison mode generates a switch that switches the functional circuit to an open state. a control signal; and 095136116 21 1003026744-0 L year and month capital for the replacement of the flag page; Chinese han 7^2 day] [Supplementary correction period when the capacitance of the sensing container is less than the comparison capacitor The second control signal of the squadron circuit of the squadron is as follows: for the electronic device of the fifth item (4), wherein the comparison module comprises: a differential amplification H having a connection with the conductive plate a first input end, a second input end connected to the capacitor, an output end, and an integrating capacitor n, the integrating capacitor having a first plate and a ground connected to the output end of the difference reducer a second plate; wherein the comparison module further includes a comparator, the comparator having a first input connected to the output of the differential amplifier, and a first wheel end connected to the reference voltage level And the comparison module The output terminal is connected to the output; the comparison module further includes an integrating capacitor. The electronic device of claim 5, wherein the conductive plate comprises a plurality of conductive plates, the plurality of conductive plates being located under a plurality of positions of the outer casing and connected to each other. The electronic device of claim 5, wherein the conductive plate comprises a conductive plate conformal to the outer casing. 11.1354882 The day of the month is thick _! ΓPlease call the special machine _ Zhong Xin far from the pure chip resistor 'capacitor vibrator. 12. A method of power management for a device, comprising: providing a reference capacitor having a reference capacitance; providing a capacitor including a conductive plate, the electrical board being located under the outer casing of the device, when the user and the forest In the device_, the sensing capacitor has a first capacitance smaller than the reference capacitance, and when the user contacts the dielectric core of the sigh, the _ residual has a larger than the reference capacitance a capacitance is compared with the reference electrical line; and when the sensing container has a first capacitance smaller than the scale capacitance, the functional circuit of the device is switched to a closed state And switching the functional circuit to an open state when the sensing capacitor has the second capacitance greater than the reference capacitance. The power management method of claim 12, wherein comparing the capacitance of the sensing capacitor with the reference capacitance comprises: charging the sensing capacitor and the reference capacitor; and conducting the conductive The voltage level of the board is compared to the voltage on the reference capacitor. 095136116 1003026744-0 23 14. The power management method of claim 12, wherein "the sensed " valley compares with the reference capacitance spider comprises: ten said sensing capacitor and said base a port. Periodically charging and discharging each state of the packet; comparing the first pulse on the conductive plate with a first pulse signal and a pulse signal; and between the pulse signal and the second pulse signal The first relationship charges the integrating capacitor; and ==—the second relationship between the pulse signal and the second pulse signal, and discharges the integrating capacitor. 15. 16. The power management method according to Item U, wherein Comparing the sensation and the reference capacitance further includes comparing the reference voltage level on the integrated circuit power (9). The power management method according to Item 15, wherein the sense=book The comparison between the current (4) and the reference capacitance further includes: generating a first control signal when a surface on the integrating capacitor is higher than the reference voltage level; and a power on the device of the king Low waste The second control signal is generated when the reference electric house level is used. The power management method as described in claim 16 of the patent application, 24 095136116 1003026744-0 1354882 t Dingyue _^·—^ _Functional circuit_to_controlling 彳 波 关闭 关闭 关闭 关闭 关闭 关闭 关闭 关闭 关闭 关闭 关闭 关闭 关闭 关闭 关闭 关闭 关闭 关闭 关闭 关闭 关闭 关闭 关闭 关闭 关闭 关闭 关闭 095 095 095 095 095 095 095 095 095 095 095 095 095 095 25 1003026744-0