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OwnerJingjing Wang, Zhaohua Qian +4inventors
InventorsJingjing Wang, Zhaohua Qian, Bingzhao Zhang, Chunbiao Wu, Jie Peng, Jiandong Ke
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An operational amplifier, a drive circuit, an interface chip (1201, 1301, 1401, 1501), and an electronic device (1600) relate to the field of power electronics technologies. The operational amplifier includes a first load (R1), a second load (R2), a first switching transistor group (301-1), a second switching transistor group (301-2), and a tail current source (203). The first switching transistor group (301-1) has a first end connected to a first output end (outp) of the operational amplifier and connected to a power supply (VDD) of the operational amplifier by using the first load (R1), and has a second end grounded by using the tail current source (203). The second switching transistor group (301-2) has a first end connected to a second output end (outn) of the operational amplifier.
An operational amplifier, wherein the operational amplifier comprises:
A gain adjustment method for an operational amplifier, wherein the operational amplifier comprises a first switching transistor group and a second switching transistor group, the first switching transistor group and the second switching transistor group comprise a same quantity of at least two input adjustment units, an input end of each of the input adjustment units is configured to connect to an input signal, and the method comprises:
Dependencies are inferred from the claim text.