Voltage control current source circuit, and transcranial electric stimulation equipment
A voltage-controlled current and source circuit technology, which is applied in control/regulation systems, electrotherapy, and regulation of electrical variables, can solve problems such as high cost and complex circuit structure, and reduce circuit volume, complexity, and cost. Effect
Inactive Publication Date: 2019-10-11
INST OF AUTOMATION CHINESE ACAD OF SCI
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[0004] In order to solve the above problems in the prior art, that is, to solve the problem of complex circuit structure and high cost caused by using more components (such as operational amplifiers), the first aspect of the embodiments of the present invention provides a voltage control current source circuit,
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[0025] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention.
[0026] refer to figure 1 , the first aspect of the embodiment of the present invention discloses a voltage-controlled current source circuit,
[0027] The voltage-controlled current source circuit includes a first operational amplifier A1104, a control voltage Vc101, a first resistor R1102, a second resistor R2103, a sampling resistor Rs105 and a load resistor RL106 connected in series in sequence, wherein:
[0028] The inverting input terminal of the first operational amplifier A1 is connected to the common node of the first resistor R1 and the second resistor R2, the output terminal of the first operational amplifier A1 is connected to the ...
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The embodiment of the invention relates to the technical field of the electronic circuit or transcranial electric stimulation, and the problem that the circuit is complex in structure and high in costis solved. On the one hand, the embodiment of the invention discloses a voltage control current source circuit, an inverted input end of a first operational amplifier A1 is connected with a public node of a first resistor R1 and a second resistor R2, an output end of the first operational amplifier A1 is connected with a public node of the second resistor R2 and a sampling resistor Rs, and a node, back from a sampling resistor Rs, of the load resistor RL is grounded; the circuit further comprises a fourth resistor R4 and a standard voltage Vref, a fifth resistor R5, a third resistor R3 and asecond operational amplifier A2 which are serially connected. The circuit disclosed by the embodiment of the invention has the advantages that the current direction and size of the voltage control flow through the load resistor RL can be realized by only using two operational amplifiers, one reference voltage and six resistors, the complexity degree of the circuit is reduced, and the circuit volume is reduced, and the cost is lowered.
Description
technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a voltage-controlled current source circuit and transcranial electrical stimulation equipment including the same. Background technique [0002] Cranial electrotherapy stimulation (CES for short) is a treatment method completely different from traditional drug therapy and electric convulsion therapy. The brain secretes a series of neurotransmitters and hormones that are closely related to anxiety, depression, insomnia and other diseases, so as to achieve the treatment of these diseases. [0003] The voltage-controlled current source circuit is the core technology of transcranial microcurrent stimulation. The voltage-controlled current source circuit used in conventional transcranial microcurrent stimulation equipment needs to use more operational amplifiers, the circuit structure is complex, and the cost is high. Therefore, there is a need for a voltage-controlled cur...
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IPC IPC(8): G05F1/10A61N1/18
CPCA61N1/18G05F1/10
Inventor 戚自辉蒋田仔余山张玉瑾刘浩
Owner INST OF AUTOMATION CHINESE ACAD OF SCI