TW584951B - Decoupling capacitor circuit with dynamic control - Google Patents

Abstract

The present invention provides a decoupling capacitor circuit with dynamical control. This circuit comprises a transistor switch that may cut off the decoupling capacitor circuit in accordance with the usage situation to reduce the gate leakage current.

Description

584951

-__ V. Explanation of the invention (1) [Technical power to which the invention belongs] The present invention relates to an electric decoupling capacitor circuit structure, and particularly to a dynamically adjustable decoupling capacitor circuit structure. [Previous Technology] Due to the rapid development of semiconductor technology, an integrated circuit is often composed of hundreds of transistors and capacitors on a small area. The most basic components of this 4b element are as follows: MOS transistors' protect gate action through these MOS transistors and form a series of logic signals. " Traditionally, when the applied voltage is lower than 1 volt, some decoupling capacitor circuits are needed around the integrated circuit to suppress noise. The traditional circuit architecture is as shown in Figures A and B. As shown, a decoupling capacitor circuit is formed between a high-voltage (VDD) and a low-voltage (VSS) by using a PM0S transistor 101 or an NMOS transistor 102 with a source and a collector connected in series with a resistor 100. Alternatively, as shown in FIG. 1c, a PMMOS transistor 103 and a NMOS transistor 104 are coupled to each other. However, with the advancement of the process, the requirements for components have become narrower, especially when the gate oxide layer of the crystal is thinned and the decoupling capacitor circuit is used to suppress the source of leakage current on the integrated circuit. 'As a result of the overload of the line, the density has also increased. After the line width has been increased to 0.13 micrometers, the M0S voltage has caused the gate leakage current and greatly reduced the noise suppression function. In other cases, the driving voltage of most of the electrical components will be insufficient.

Page 4 584951 V. Description of the invention (2) The item does not work normally. Summary of content] The present invention can suppress the leakage current, current consumption, and main leakage current of the body switch block of the present invention. The other project can be based on the structure of the whole project, and with better implementation components, its operation situation, the flow is only much smaller than the electrical improvement isolation is generated. The purpose is to provide the switching circuit. The purpose is to provide the switching element in the decoupling circuit to reduce the power supply, for example, to dynamically cut off the gate noise performance of the capacitive element of the transistor switch. A decoupling capacitor circuit architecture, a decoupling capacitor circuit architecture, and the state is dynamically adjusted. A type of decoupling power consumption that can be dynamically adjusted. The valley circuit architecture includes at least one electrical circuit, which can be coupled to the capacitor circuit according to the corresponding integrated circuit function. Therefore, even if the source and collector and the channel and the leakage current of the channel are stopped, the power consumption can be reduced. The precise example of the present invention, after introducing the practical spirit of the present invention, can be applied in different integrated circuits according to the working spirit and application scope of the integrated circuit; familiar with the technology of the field to use the invention. Among them, the working state of the present invention is dynamically adjusted. The following is an implementation artist who understands the capacitor circuit architecture in the coupling capacitor circuit architecture to reduce the leakage current.

584951 V. Description of the invention (3) F production and reduce power consumption. Referring to the second AM structure, w shows a decoupling capacitor circuit frame according to a preferred embodiment of the present invention. The present invention's structure: the use of a transistor switch to replace a conventional resistor. According to it: a capacitor element 201 is connected in series with a transistor switch 202 to form the source and circuit structure of the present invention, wherein the capacitor element 201 of the present invention can use f _ pW. The connected PMOS transistor or .05 transistor is formed, and the electric body switch 202 may be a MOS transistor. Pompano? As shown in the second figure A, the pole switch between 2 ° 2 and the control body switch 202 is turned on or off. When it is turned on every day, its function is like V, and the body switch 202 is shown. . The eight force moon dagger is like-the resistance 203, as shown in the second diagram B = two diagram A 'When the transistor switch 202 can generate only the current of the transistor, the leakage current at the cutoff In this drain structure, the gate leakage current generated by the capacitive element is passed. First, the capacitor circuit frame is first connected. According to the above description, the transistor of the present invention can be opened according to the use of integrated circuits. Control on or off. Generally speaking, the entire functional block of the transistor switch 202 is controlled throughout Xin2, and each functional block will ::: = will often include several channels to isolate external noise, when integrated electrical decoupling capacitor electrical area The blocks will all move. In other words, when it is not working, not all functions are decoupling capacitor circuits to isolate the external = energy range. If it is used to pass 1 noise 'because of gate leakage current 584951 V. Description of the invention (4)-relationship, It still consumes power. On the contrary, the circuit structure of the present invention sends a control signal when the connected functional block is not activated, and cuts off the transistor switch 202 of the decoupling capacitor circuit structure 200 of the present invention. That is: the leakage current that may be generated by the decoupling capacitor circuit architecture 200 at this time is only the leakage current under the reverse bias between the source and collector and the channel of the transistor switch 202, which is less than the gate leakage of the capacitor element. Current, so it can reduce power consumption and increase noise at the same time. n

Taking the preferred embodiment of FIG. 1A as an example, a PMOS transistor with a source and a collector connected is used as the capacitor element 201 of the present invention. The channel length of the PMMOS transistor is about 2um, and the channel width It is about 2 X 〇5um, and its capacitance is about 3.6nF. At this time, the gate leakage current is about 91lUA. An NMOS transistor is used as the transistor switch 202 of the present invention. NMOS is used because its electron drift speed is faster than PMOS transistor. Therefore, using NMOS transistor can have a faster switching speed. The circuit structure of the present invention can also be controlled by using pMOS transistor, and the selected NMOS transistor channel length is about 0.26um, and the channel width is about 105um. At this time, the source and collector and the channel are cut off. The leakage current is about 7uA. Generally speaking, the transistor switch design of the present invention usually adopts a longer channel design to reduce leakage current.

Referring to the third figure, in order to apply the circuit architecture of the present invention to a capacitor circuit 300 for an electric double crystal. Among them, the nmOS transistor 301 and the PMOS transistor 302 can receive a control signal to cut off the decoupling capacitor circuit 300. For example, when the integrated circuit connected to the capacitor circuit 300 is not activated, a control signal will be sent at this time to turn on the transistor 3 〇1 and the transistor 3 〇2 to connect the high-voltage signal (VDD) to low. The voltage signal (vss) is transmitted separately

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584951 V. Description of the invention (5) Pass to PMOS transistor 303 and title transistor 3 crystal. The gates are used to cut off the two power sources. Because of the decoupling capacitor circuit architecture of the present invention, it can be said that when the corresponding person is Lei Zheng # Ab p ^ subscribe to evil control, in other words, the functional block of the wrong way is not performed ^ ^ Decoupling Capacitor circuit, so even if it is produced; ::, movable and tragic gate leakage current, so it can reduce power: when dying out; 1: capacitor element: Yes. U Titinan reduces the noise effect. Although the present invention has been settled with-/ 4. ^, The button h is better to reveal the road like J ", but it is not used to limit the unknown months, anyone who is familiar with this skill, within the scope It can be argued that it does not depart from the spirit and scope of the present invention, and is attached to the German patent. Therefore, the scope of protection of the present invention is defined by the scope of the patent application attached to Tianshi 584951.

Brief Description of the Drawings [Simplified Description of the Drawings] In order to make the above and other objects, features, and advantages of the present invention more comprehensible, a preferred embodiment is given below in conjunction with the accompanying drawings to make a detailed description as follows : Figures A through C show the traditional decoupling capacitor circuits. FIG. 2A is a schematic diagram of a decoupling capacitor circuit according to the first preferred embodiment of the present invention. The second diagram B shows a circuit diagram of a decoupling capacitor circuit according to the first preferred embodiment of the present invention. The third figure shows a schematic diagram of a decoupling capacitor circuit according to a second preferred embodiment of the present invention. [A brief description of the symbols of the components] 100 and 203 resistors 1 0 1 and 20 1 The source is connected to the collector pM0s transistor 102 The source is connected to the collector NM0s transistor 103, 303 and 302 PMOS transistor 104, 202, 301, and 304 NMOS transistors 200 and 300 decoupling capacitor circuits

Claims (1)

584951 6. Scope of patent application 1. A dynamically adjustable decoupling capacitor circuit is connected to an integrated circuit to isolate external noise from affecting the integrated circuit. The circuit includes at least: a capacitor coupled to a first power source And a switching element connected to the capacitor 'and the capacitor can be connected to the second voltage source through the switching element. 2. The dynamically adjustable decoupling capacitor circuit according to item 1 of the scope of the patent application, wherein the first voltage source is a high voltage source and the second voltage source is a low voltage source. Q • The dynamically adjustable decoupling capacitor circuit described in item 1 of the scope of the patent application, wherein the first voltage source is a low voltage source and the second voltage source is a high voltage source. The 4-way dynamically adjustable decoupling capacitor as described in item 1 of the scope of patent application, wherein the capacitor is a pM0s transistor with a source and a collector connected. The five-way dynamically adjustable decoupling capacitor as described in the first item of the 范围 Li range, I capacitor is a NMOS transistor with a source and a collector connected. 6 · As described in item 丨 of the scope of patent application, in which the switching element is a transistor to move the cancer, adjust it to engage the capacitor 584951 6. Application for patent scope 7. As described in item 1 of the scope of patent application A dynamically adjusted decoupling capacitor circuit, wherein the switching element is connected in series with the capacitor. 8. The dynamically adjustable decoupling capacitor circuit as described in item 1 of the patent application scope, wherein when the connected integrated circuit is not operating, the switching element cuts off the connection between the capacitor and the second voltage source. 9. A dynamically adjustable decoupling capacitor circuit, connected to an integrated circuit to isolate external noise from affecting the integrated circuit, the circuit at least includes: a capacitive element coupled to a first voltage source and a second voltage source And first and second switching elements are respectively coupled to the capacitive element, wherein the capacitive element can be coupled to the first voltage source through the first switching element and coupled to the first voltage source through the second switching element Second voltage source. 10. The dynamically adjustable decoupling capacitor circuit according to item 9 of the scope of the patent application, wherein the first voltage source is a high voltage source and the second voltage source is a low voltage source. 11. The dynamically adjustable decoupling capacitor circuit according to item 9 of the scope of the patent application, wherein the first voltage source is a low voltage source and the second voltage source is a high voltage source. 1 2. The dynamically adjustable decoupling capacitor circuit as described in item 9 of the scope of the patent application, wherein the capacitor element is composed of a plurality of transistors. Page 11 584951 VI. Scope of patent application Three channels are specially requested for adjustments such as the capacity and coupling in the Haishi 0 >. The state I of the dynamic body can be described as 9 items of the first element, 1st of the opening, II, 14th, and a dynamically adjustable decoupling capacitor circuit as described in item 9 of the patent application scope, wherein the second switching element It is a transistor. 15. The dynamically adjustable decoupling capacitor as described in item 9 of the scope of patent application, wherein when the connected integrated circuit is not operating, the first switching element will cut off the capacitor element and the voltage source Of connection. 16. The dynamically adjustable decoupling capacitor f as described in item 9 of the scope of the patent application, wherein when the connected integrated circuit is not operating, the second switching element will cut off the capacitance element and the second voltage source. connection. 17. A good method for adjusting and closing a light-capped capacitor circuit, wherein the capacitor circuit / and the entire circuit are connected to isolate external noise from affecting the integrated circuit. The decoupling capacitor circuit $, 丨, a & ^ ^ t, yin > Contains a capacitor element blood 7G switch, and the capacitor element can be coupled to a voltage source via the switch element 哕 M 4 Μ /, _ / h β field, the method to ^ Pack 3 · Generate a control signal and value & after operation; and pass it to the switching element, when the integrated circuit stops controlling the signal to control the switch ^ μ 1 The switch shuts off the connection between the capacitive element and the voltage source Page 12 584951 VI. Scope of patent application 18. The method for dynamically adjusting a capacitor circuit as described in item I of the scope of patent application, wherein the voltage source is a high-power source. 19. The method for dynamically adjusting a decoupling capacitor circuit according to item 17 of the scope of patent application, wherein the voltage source is a low voltage source. 20 · The method for dynamically adjusting a decoupling capacitor circuit as described in item 17 of the scope of the patent application, wherein the capacitor element is a 〆 source and collector connected P Μ 0 S transistor 21 · as described in the scope of the patent application A method for dynamically adjusting a decoupling capacitor circuit, wherein the capacitor element is a NMOS transistor with a zeta source connected to a collector. 2 2 · The method for dynamically adjusting a decoupling capacitor circuit according to item 7 of the patent application scope, wherein the capacitor element is composed of a plurality of transistors. 2 3. The method for dynamically adjusting a decoupling capacitor circuit according to item 17 of the scope of the patent application, wherein the switching element is a transistor. 24. The method for dynamically adjusting a decoupling capacitor circuit according to item 17 of the scope of the patent application, wherein the switching element is connected in series with the capacitor element.