Energy-saving voltage stabilizer
A voltage regulator and voltage technology, which is applied in the direction of instruments, electric variable adjustment, control/regulation systems, etc., can solve the problems of low energy consumption application limitations and increased energy consumption of voltage regulators, and achieve small chip area occupation and low energy consumption. Reduce, compensate for the effect of slowing down
Active Publication Date: 2014-07-16
SHANGHAI HUAHONG GRACE SEMICON MFG CORP
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Problems solved by technology
[0005] The purpose of the present invention is to provide an energy-saving voltage regulator to solve the problem that the current voltage regulator circuit needs a bandgap circuit to generate a reference voltage, resulting in increased energy consumption in standby mode and limiting the low energy consumption application of the voltage regulator
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[0022] The energy-saving voltage regulator proposed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in very simplified form and use imprecise ratios, which are only used for the purpose of conveniently and clearly assisting in describing the embodiments of the present invention.
[0023] The core idea of the present invention is to provide an energy-saving voltage regulator, which includes a reference circuit, an operational amplifier, and a voltage dividing circuit. The reference circuit is composed of low-threshold transistors connected in series in the saturation region, and the reference circuit generates a reference voltage and an intermediate potential according to a DC input voltage; the non-inverting input terminal of the oper...
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The invention discloses an energy-saving voltage stabilizer, which comprises a reference circuit, an operational amplifier and a voltage division circuit. The reference circuit consists of low-threshold transistors connected in sequence in series and generates a reference voltage and an intermediate potential according to a DC input voltage; the non-inverting input end of the operational amplifier inputs the reference voltage, the inverting input end of the operational amplifier inputs a feedback voltage, and the feedback voltage is under control of the intermediate potential; and the voltage division circuit outputs the output voltage of the energy-saving voltage stabilizer and consists of low-threshold transistors connected in sequence in series. Sine the intermediate potential can compensate for the feedback voltage, the influence of the DC input voltage fluctuation of the reference circuit on the output voltage of the energy-saving voltage stabilizer can be reduced; and since the reference circuit and the voltage division circuit both consist of low-threshold transistors, the invention is applicable to the low power voltage, and simultaneously no band gap reference source is needed, thereby reducing the energy consumption of the reference circuit and the voltage division circuit in the standby mode.
Description
technical field [0001] The invention relates to the application field of integrated circuits, in particular to an energy-saving voltage stabilizer in a low-energy application circuit that can reduce extra energy consumption due to fluctuations in the power supply itself in a standby mode. Background technique [0002] At present, integrated circuits provide stable voltage through voltage regulators. For a voltage regulator, the reference voltage is an essential element for the voltage regulator to generate the output voltage. The generation of the reference voltage usually requires a bandgap circuit. Please refer to figure 1 , figure 1 Schematic diagram for the circuit structure of the existing voltage regulator, such as figure 1 As shown, the existing voltage regulator circuit includes a bandgap circuit 10, an operational amplifier 20, and a voltage divider circuit 30; the voltage divider circuit 30 includes a PMOS transistor M1 and a resistor R3 connected to the drain of...
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IPC IPC(8): G05F1/10
Inventor 杨光军
Owner SHANGHAI HUAHONG GRACE SEMICON MFG CORP