Energy-gap reference voltage circuit
A technology of energy gap reference and voltage circuit, which is applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., and can solve problems such as failure to generate, error-prone opening and closing time, and insufficient speed
Inactive Publication Date: 2013-03-27
ULTRA CHIP INC
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[0006] However, the disadvantage of current circuits for generating bandgap reference voltages is that the turn-on and turn-off timings of the starting circuit and the bandgap voltage generating circuit are prone to errors; for example, the starting circuit is turned off, but the bandgap voltage generating circuit fails to generate energy or the bandgap voltage generation circuit has been able to generate the bandgap reference voltage, but the starting circuit has not been closed; these situations will cause errors to occur when generating the bandgap reference voltage; in addition, the time to generate the bandgap reference voltage Also seems too long and not fast enough
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[0061] The detailed description and technical content of the present invention will be described as follows with the accompanying drawings, but the attached drawings are only for illustration purposes and are not intended to limit the present invention.
[0062] Please refer to figure 1 , is a block diagram of the energy gap reference voltage circuit of the present invention. The bandgap reference voltage circuit 10 of the present invention is applied to the high potential end 20 and the low potential end 30; the bandgap reference voltage circuit 10 includes a first potential end 102, a second potential end 104, a starter circuit 40, a bandgap voltage sub circuit 50 and auxiliary sub-circuit 60.
[0063] The starting sub-circuit 40 includes a sixth resistor 402 , a tenth transistor 404 , an eleventh transistor 406 , a twelfth transistor 408 and a thirteenth transistor 410 .
[0064] The bandgap voltage sub-circuit 50 includes a bandgap reference voltage output terminal VBG, ...
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The invention provides an energy-gap reference voltage circuit, comprising a starter circuit, an energy-gap voltage subcircuit and an auxiliary subcircuit, wherein the energy-gap voltage subcircuit comprises an operational amplifier; the operational amplifier comprises an output end, an inverting input end and a non-inverting input end; and the auxiliary subcircuit comprises a first transistor. When the first transistor is switched on, micro pressure difference is generated between the potential of the inverting input end and the potential of the non-inverting input end, so that the energy-gap reference voltage can be generated correctly and quickly.
Description
technical field [0001] The invention relates to a reference voltage circuit, in particular to an energy gap reference voltage circuit. Background technique [0002] The reference voltage refers to a voltage in the circuit that can remain constant regardless of power supply, temperature drift, process drift, time, etc.; the reference voltage can be applied to the voltage regulator of the power supply system and many other systems such as measurement and control and other places; the error of the reference voltage is different in different applications. For example, in a general calculator power supply system, the error of the reference voltage is not greater than one percent of its standard value, while the reference voltage standard of the laboratory is Has higher stability and precision. [0003] In the past, the reference voltage can be generated by means of resistor divider or transistor self-bias; however, the reference voltage generated in this way is easily affected b...
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IPC IPC(8): G05F3/20
Inventor 魏世忠
Owner ULTRA CHIP INC