TWI243472B - Voltage generator and method for generating stable voltage - Google Patents

Abstract

A voltage generator for generating stable voltage is described. The voltage generator includes a voltage dividing circuit, a first differential amplifier, a second differential amplifier, a first switch, and a second switch. When the first input voltage is lower than the reference input voltage, the first output voltage signal is at high state, so that the generator output voltage increases. When the second input voltage is higher than the reference input voltage, the second output voltage signal is at high state, so that the generator output voltage decreases. Thus, the generator output voltage is a substantially stable voltage.

Description

1243472 发明 Description of the invention [Technical field to which the invention belongs] The present invention relates to a voltage and a stable voltage, and in particular to a voltage generator that generates a stable lightning voltage in a circuit and provides the stable voltage. Methods. [Prior art] In the circuit, various electronic components must be in a proper state to enable the electronic components to have their proper functions. For example, when an electric crystal is used in the amplification function, it must be operated in the linear region. To provide—a proper bias, a stable voltage or current source is required. Recently, due to the development of the electronics industry, integrated circuits that can accommodate a large number of crystals are becoming more common. With the progress of process technology, the size of several pieces in integrated circuits has also become smaller and smaller. The size of the electronic component changes, and the required bias value of the electronic component also becomes smaller. Therefore, to generate electricity from a fixed voltage source: The output voltage of the generating circuit and the magnitude of the voltage change must be changed according to the manufacturing technology and the size of the electronic components. This voltage generating circuit is not capable of generating the required voltage * 'and it must be able to maintain the wheel-out voltage at a stable level' so that the electronic components in the integrated circuit can operate at the correct drop point. Ws Therefore, in a integrated circuit, how to make a stable voltage source that meets the bias requirements of small-sized electronic components, and smartly adjust the voltage value is very urgently needed in the industry. [Abstract] The purpose of the present invention is to provide a voltage generator that can provide a voltage. Another object of the present invention is to provide a voltage generator that can set a first input. The voltage, input voltage, and input voltage make the generator a stable voltage source. Within the _ of Μ… ^ ... The purpose of the present invention is to provide a voltage generator for a burn-in test circuit of a beta memory device: in a normal mode, a bit line precharge voltage can be provided. And the voltage of the capacitor plate, the top; 疋 can be turned off in the test mode. 2 According to the book: the purpose of the 'propose a voltage generator for generating the voltage on the jinbei'. The voltage generator includes a voltage divider circuit, a first differential amplifier, a second amplifier One differential amplifier state, one first switch and one two switch.… Road basis-reference high voltage and a generator output voltage production =-input dust and a second input voltage ... reference high voltage: Yu苐 -input voltage, the first input voltage is higher than the second input voltage, and the second input voltage is higher than the generator output voltage. Β The first differential amplifier generates a first output voltage signal according to a reference input voltage and the first input voltage. The H dynamic amplifier A generates a second output voltage signal according to the reference input voltage 0 and the second input voltage. Σ When the first output voltage signal is high, the first switch provides a high voltage source to the generator output voltage. When the second output voltage signal is high, the second switcher provides a low voltage source to the generator output voltage. 1243472 Among them, the input of the younger one is lower than that of the husband and the thunder sounds at-, i is low When the input voltage is measured in the tea test, the second-output electrical signal is in a still-potential state, which makes the ^ ^ X ^ _ yuppie increase for the output electrical genus. When the input voltage of the younger one is two than the reference input, you receive it in Gu Xue ... According to the purpose of the present invention, a method for generating a substantially stable electricity is also provided. The method includes the following reference high voltage and a Generate ψ / minute M circuit response and output voltage generation-the first input voltage ^ ^ ^ ^, the reference voltage is higher than the first input voltage, the first input voltage is higher than the second input voltage higher than the generator output Voltage. The first input electrical house. Then, a first differential amplifier enters the thunder line a ... according to the reference input voltage and the first-round output voltage signal. Then, the amplifier is based on the reference input voltage and the second input. Upper difference 2: voltage signal. When the first output voltage signal is high and the signal is high, the first ::: change :: voltage source. When the second output is electrical waste, the low power source is covered. Electricity · Provide one When the first input voltage is lower than the reference wheel-in voltage, the first voltage signal is at a high potential energy ladder. The potential state makes the generator output „fall ::: power on = is it high that it is a substantially stable”. Wrong, the generator wheel powers out 3 because this electric star generator can determine the range of the voltage value of the output electric dust by the input voltage, voltage and McCaw input voltage range 7 1243472, so this voltage produces The device can generate a substantially stable one for transmitting the first-output voltage signal and the second output. Two of them: Because the -first-mode switching circuit and the tiger's reverse path can be used to switch thunderbolts, the voltage is generated. The device can provide bit line electricity and capacitor plate voltage in normal mode, and can be turned off in burn-in test mode. 、 Electric Fort [Embodiment] Di Er 22 = shows the block diagram of the voltage generator of the present invention. Please refer to Fig. 1A. The voltage generator ι〇〇 includes a voltage divider circuit ^: a differential amplifier 104, a second differential amplifier — a first one, and a second switcher 110. The switch 108 divides the voltage circuit 102 according to the reference high voltage 116 and the output voltage 462 to generate a first input power 112: Input ^ Jidi an input voltage 114. The middle reference high voltage 116 is higher than the first input voltage 112, the first input voltage m is higher than the second input voltage 114, and the second input voltage 114 is high: the generator output voltage 462. 'The first differential amplifier 104 generates a first output voltage signal 118 based on the reference input voltage 122 and the first input voltage S U2I. Second differential amplification: 106 generates a second output voltage signal 120 according to the reference input circuit 122 and the second input circuit 迁 4. -When the first output voltage signal 118 is high, the first switch provides a high voltage source 123 to the generator output voltage 462. When the second-round power dust signal 120 is high, the second switcher 110 provides a low voltage source 124 to the generator output voltage 462. 1243472 When the first input voltage 112 is lower than the reference input band — the output voltage signal 118 is at a high potential state. When the lightning output voltage 462 of the generator Ⅱ is higher than the reference input voltage 122, the second decreases. The gate-like evil causes the generator output voltage 462. Figure 1B shows the voltage output of the present invention. The circuit is the preferred embodiment in which voltage is too high. In this embodiment, the first switch M

Lei Yue scales, ν ^ Niu 1 magic surgery into a MOS jade Yue body 126. The second switch η〇 lifts…… a MOS transistor 餸 128. Brother 1 switcher 108M. The gate of the ^^ and MUS electric sun body 126 is connected to Brother 1 output voltage signal 118. The first switch is a MOS transistor 126 of 108 which is connected to the high voltage source 123. The source of the MOS thunder 駚 1 of the first switch 108 is connected to the source of the MOS electric sun body 126 of the first switch 108, the MOS transistor 128 of the second switch 110, the square electrode 唾 8, and the pole. The gate of the MOS transistor 128 of the second switch 110 is connected to the second output signal 120. The first-switch, the source of the m tMOS transistor 128 is connected to a low voltage source 124 ° the drain of the MOS transistor 128 of the second switch 110 is connected to the generator output voltage 462. Referring to Fig. 1B, the first mode switching circuit 13o is interposed between the first differential amplifier UM and the first switch '108. The first mode switching circuit BO receives the burn-in test mode signal, WBI 464, and WBIN 134, where WBIN134 is the opposite signal of WBI 464. 8 The second mode switching circuit 132 is placed in the second differential amplifier 106 and the second switching n iim type circuit 132 receives the burn-in test mode signal ′ WBI 464 and WBIN 134. 1243472 The first-mode switching circuit 13o and the __ provide the selected pendulum ... The θ-type switching circuit 132 can, select, and never provide the generator output voltage 462. For example, this voltage generator 丨. . Burn-in test electricity for a DRAM: 'Generator Input_ 462 can provide a capacitor plate electricity in a normal mode = a storage capacitor in a memory unit. In the burn-in test mode, electricity # 生 益 1〇0 can A burn-in test mode signal WBI 464 is used to cut off the output voltage signal 118 and the second output voltage signal 120, so that

疋 The test voltage can be forcibly input to the storage capacitor in the memory unit through the test pin 129 to pressurize the storage capacitor.

: When the burn-in test mode signal WBI 464 is enabled, the first mode switching circuit 130 cuts off the first output voltage signal 118 to the first switch pair, and the first mode switching circuit 132 cuts the second output voltage. The signal 12o cuts off the path to the second switching circuit 110. When the burn-in test mode signal wbi 4 6 4 is disabled, the first mode switching circuit 丨 3 〇 connects the first output voltage signal 1 to 8 to the first switching source 108. The second mode switching circuit i connects the second output voltage signal 120 to the second switch 110. When in normal mode, the burn-in test mode signal WBI 464 is in a low level. The differential amplifiers 104 and 106 are both activated. The differential amplification state 104 has a PMOS active load 136, PMOS transistors 140 and 142, an NMOS input port, and NMOS transistors 144 and 146. The differential amplifier 106 includes an NMOS active load 138, NMOS transistors 148 and 150, a PMOS input port, and pMOS transistors 152 and 154. The resistors R1 156, R2 158, and R3 160 form a voltage divider circuit 102. The voltage divider circuit 102 is connected to the reference high voltage 116 and the generator output voltage 10 1243472 voltage 462. The voltage dividing circuit 102 is used to generate a first input voltage i2 to input a voltage U4. For example, the reference input voltage i22 is a reference input voltage generated by a band-gap votage reference. The value of Reference Electricity® 122 is higher than or equal to Reference Electricity II

Half. W

The defined range will not supply or source current to the generator output voltage 462. This range is when the first input voltage U2 is lower than the reference input voltage 122, the first output voltage signal 118 level rises to turn on the Mos transistor 126, and a current is supplied from the high voltage source 123 to the generator output voltage 462 . When the second input voltage 114 is higher than the reference input voltage 122, the second output voltage signal rises at 120 level to turn on the MOS transistor 128, and the current is derived from the generator ^ output voltage 462 to the low voltage source 124. Voltage generator 100 in one = VCC- (VCC-Vref) * (Rl + R2 + R3) / Ri < VEQ < vcc. (Vcc Vr ef) * (Rl + R2 + R3) / (Rl + R2)

Among them, VCC is the reference high voltage 116; Vref is the reference input voltage 122; R1 156, R2 158, and R3 16〇 are the resistors of the voltage dividing circuit ι〇2. In the above equation, there is no process or component parameter included, so the voltage generator 100 does not change depending on the process. In the burn-in test mode, the MOS transistors 126 and 128 are turned off by the WBI 464, where the WBI 464 is in a high potential state. The generator turn-out voltage 462 is forcibly input by the test pin 1 29. In summary, because this voltage generator can determine the range of the voltage value of cry = voltage Γ according to the first input voltage 11 1243472 m, the second input voltage 114, and the reference input voltage i22, this voltage generator Voltage on% 疋. And because it can be added in the way of transmitting the first output electrical waste signal to U8 and the second output voltage signal 120, the first mode: the switching circuit 13 and the second mode switching circuit 132, so the electrical output is ⑽ It can provide bit line pre-charging core and capacitor voltage in normal mode, and can be turned off in burn-in test mode. Although the present invention has been disclosed as above with a preferred embodiment, it is not intended to limit the present invention to anyone who is familiar with the art without departing from the essence of the present invention: _, when various changes and modifications can be made, so The warranty 3 of the present invention shall be subject to the definition in the scope of the attached patent application. [Brief description of the drawings] g In order to make the above and other objects, features, and advantages of the present invention clearer and easier to understand, a preferred embodiment is given below in conjunction with the accompanying drawings to make a detailed description as follows: = 1 A shows a block diagram of the voltage generator of the present invention; and FIG. 1B shows a circuit of a preferred embodiment of the voltage generator of the present invention. [Simplified description of several representative symbols] 100: Voltage generator 102 · Voltage divider circuit 104. First differential amplifier 106: second differential amplifier: first switch 110: second switch 12 1243472 112: first input voltage 114: second input voltage 11 6 Reference high voltage 11 8 ·· First output voltage signal 120: Second output voltage signal 122: Reference input voltage 123: High voltage source 124: Low voltage source 126, 128: MOS transistor 129: Test pin

130: first mode switching circuit 132: second mode switching circuit 134: WBIN 136: PMOS active load 138: NMOS active load 140, 142: PMOS transistor 144, 146: NMOS transistor 148, 150: NMOS transistor 152, 154: PMOS transistor 1 5 6: resistance 1 5 8: resistance

160: resistance 462: generator output voltage

464: Burn-in test mode signal, WBI 13

Claims (1)

1243472 Patent application scope 1 · A voltage generator for generating a substantially stable life pressure, the voltage generator includes at least: a voltage divider circuit, based on a reference high voltage and a generator output voltage Generating a first input voltage and a second input voltage, wherein the reference high voltage is higher than the first input voltage, the first input voltage is higher than the second input voltage, and the second input voltage is higher than the generator output Voltage; a first differential amplifier that generates a first output voltage signal based on a reference input voltage and the first input voltage; a first differential amplifier that generates a second output based on the reference input voltage and the second input voltage Voltage signal; a first switcher, when the first output voltage signal is at a high potential, the first switcher provides a high voltage source to the generator output voltage; and > a second switcher, when the first switcher When the two output voltage signals are at a high potential, the first switch of the 50H provides a low voltage source for the output voltage of the generator; wherein when the first input voltage Below the reference input voltage, the first output voltage signal is at a high potential state so that the generator output voltage increases; and "Tian" Haidi-the input voltage is higher than the reference input voltage, and the second output voltage signal is at a high potential The state causes the output voltage of the generator to decrease. 2. The voltage generator according to item 丨 of the patent application scope, wherein 14 1243472 the first switch is a MOS transistor, and the gate of the MOS transistor is connected to the first An output voltage signal, the drain of the MOS transistor is connected to the high voltage source, and the source of the MOS transistor is connected to the node providing the output voltage of the generator. 3. The voltage as described in item 1 of the scope of patent application Generator, wherein the second switch is a MOS transistor, the gate of the MOS transistor is connected to the second output voltage signal, the source of the MOS transistor is connected to a low-side voltage source, and the MOS transistor The drain of the crystal is connected to the node that provides the output voltage of the generator. Including: The voltage generator flute as described in the first item of Shenyan's patent scope-Di-mode switching circuit is placed in the Between the first differential amplifier and the switch, the mode switching circuit receives a burn-in test mode, and the second switching circuit is placed in the second differential ... Mode signal. A mode switching circuit receives the burn-in test mode circuit. When the test mode signal is enabled, the first mode switching circuit and the second mode voltage signal are cut off to the second switching circuit of the first switch. The second switching circuit cuts off the path of the second output voltage signal to the Xia circuit; and the first mode switching circuit 15 1243472 connects the first output voltage signal when the burn-in test 楹 and x flood are disabled. To the first switch, the second gas switching circuit connects the second output voltage signal to the second switch. x 5. The voltage generator according to item 1 of the scope of patent application, wherein the voltage dividing circuit includes at least: a first resistor, one end of which is connected to a node providing the reference high voltage; a second resistor; Two resistors, one end of which is connected to a section providing the output voltage of the generator, wherein the first resistor, the second resistor and the third resistor are connected in series in order, and the voltage dividing circuit is based on the reference high voltage and the generator output voltage The first input voltage and the second input voltage are generated in a divided voltage manner. 6. The voltage generator according to item 丨 of the patent application scope, wherein the first differential amplifier includes at least: a PMOS active load; a first NMOS transistor, and a gate of the first NMOS transistor. Connected to the reference input voltage, the drain of the first NMOS transistor is connected to the PMOS active load; and a second NMOS transistor, the gate of the second NMOS transistor is connected to the first input Voltage, the drain of the second NMOS transistor is connected to the PMOS active load. The voltage generator according to item 1 of the patent application range, wherein 16 1243472 the second differential amplifier includes at least: an NMOS active load; the gate of the crystal is not connected to a first PMOS transistor, and the first PMOS transistor Connected to the reference input voltage, the first PMOS transistor is connected to the NMOS active load; and the gate and the pole of the crystal are connected to a second PMOS transistor, the second PMOS is electrically connected to the second input voltage, the The second PMOS transistor is connected to the NMOS active load. 8 · —A method for generating a stable voltage, including at least: A voltage dividing circuit generates a first input voltage and a second input electrical voltage according to a reference high voltage and a production-line lightning pressure The surface voltage is higher than the first input voltage, the first input voltage is lower than the input voltage, and the second input voltage is higher than the generator output voltage. The differential amplifier generates a first output voltage signal according to a reference input voltage and + '# input voltage; the first second differential amplifier generates a second output voltage signal according to the reference input electrical input signal; and the second current When the first output voltage signal is a high potential, the generator output voltage provides a high voltage source; when the second output voltage signal is a high potential, the generator output voltage provides a low voltage. Source; when the first input voltage is lower than the reference voltage, a + voltage is applied, 'the first round of electric H tiger is in a pseudo-potential state, which increases the output voltage of the Han I ecological wheel by 17! 243472 And when the first input voltage is south of the reference input voltage, the first output voltage signal is at a high potential state, so that the generator output voltage is reduced ^ thereby, the generator output voltage is substantially stable Voltage: 9. The method as described in item 8 of the scope of patent application, further comprising: providing a MOS transistor as the first switch;-connecting the gate of the MOS transistor to the first output voltage signal ;. The drain of the MOS transistor is connected to the high voltage source; and the source of the MOS transistor is connected to a node providing the output voltage of the generator. "10. The method described in item 8 of the scope of patent application, further comprising providing a MOS transistor as the second switch 3 Connect the gate of the MOS transistor to the second output voltage signal. Connect the source of the Xuan MOS transistor to the low voltage source; and: the drain of the MOS transistor is connected to provide the generator wheel to produce electricity 1. The party described in item 8 of the scope of patent application will be- -The mode switching circuit is placed between the first differential amplifier and / tool changer 1 ™, wherein the first mode switching circuit receives-burn-in 18 1243472 test mode And when the first signal is received; and a second mode switching circuit is placed between the second differential amplifier and the switch 'where the second mode switching circuit receives the pre-amplified signal; & When the burn-in test mode signal is enabled, an output voltage signal of the first mode switching circuit cuts off the path to the first switch; when the burn-in test mode signal is enabled, the second mode switching circuit outputs two The voltage signal cuts off the path of the second switching circuit; when the burn-in test mode signal is disabled, an output voltage signal of the first mode is connected to the -switch; and when the burn-in test mode signal is disabled, the second Formula two switching output voltage signal is connected to the second switch. 12. The method as described in item 8 of the scope of patent application, wherein it further includes: combining a first resistor, a second resistor, and _3 to form the voltage dividing circuit, wherein the first 'series is the reference height Voltage node, the third resistor is at the node that provides the output voltage of the generator; and ^ is connected to provide the product: the second voltage circuit generates the first input voltage and the second input voltage according to the reference high voltage and the blade voltage method. The second input voltage 13. As described in item 8 of the scope of the patent application, a PMOS active load, the-/,, and more include: 罘-NMOS transistor and-19 1243472 The second NMOS transistor is combined into the first difference An amplifier; connecting the gate of the first NMOS transistor to the reference input voltage; connecting the drain of the first NMOS transistor to the PMOS active load; connecting the gate of the second NMOS transistor to the A first input voltage; and a drain of the second NMOS transistor connected to the PMOS active load. 14. The method according to item 8 of the scope of patent application, further comprising: combining an NMOS active load, a first PMOS transistor, and a second PMOS transistor into the second differential amplifier; The gate of the PMOS transistor is connected to the reference input voltage; the drain of the first PMOS transistor is connected to the NMOS active load; the gate of the second PMOS transistor is connected to the second input voltage; and The drain of the second PMOS transistor is connected to the NMOS active load. 20