High-precision amplifying circuit especially for ion sensitive field effect sensor
A technology of ion-sensitive field effect and amplifier circuit, which is applied in the field of biosensors, can solve problems that are difficult to realize, and achieve the effects of suppressing temperature drift, novel structure, and high power supply rejection ratio
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[0045] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0046] Such as figure 1 as shown, figure 1 The circuit diagram of the high-precision amplifier dedicated to the ion-sensitive field effect sensor provided by the present invention, the high-precision amplifier circuit at least includes a main amplifier 11, an auxiliary amplifier 12 and a clock 14.
[0047] Among them, the main amplifier 11 is used to continuously amplify the sensitive signal input by the sensitive gate of the sensor, and output the final amplification processing result.
[0048] The auxiliary amplifier 12 is used to alternately receive the sensitive signal input by the sensitive gate of the sensor under the control of the clock, amplify the received sensitive signal to obtain the amplified processing res...
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