Bandwidth-adjustable operational amplifier circuit
An operational amplifier and circuit technology, used in DC-coupled DC amplifiers, differential amplifiers, and improved amplifiers to expand bandwidth, etc., can solve problems such as increasing the operating current of operational amplifiers, reduce layout area, and reduce performance The effect of good stability
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[0036] 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.
[0037] Such as figure 1 as shown, figure 1 It is a structural schematic diagram of an operational amplifier circuit with adjustable bandwidth according to an embodiment of the present invention. The operational amplifier circuit includes a bias circuit, a fully differential operational amplifier main circuit and a common-mode feedback circuit. Among them, the bias circuit is used to provide a stable bias current independent of temperature and process for the main circuit of the fully differential operational amplifier and the common-mode feedback circuit; the main circuit of the fully differential operational amplifier is a two-stage amplified full-rail output structure. Under the action of the bias current, it provides ...
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