Other

Ampliphy Technologies Limited

Sheng Huang

Qi Chen

Hehong Zou

Tianlin Cao

Junzhong Wu

Zhiyang Wang

A fully-differential two-stage operational amplifier circuit is provided, and it includes a first-stage amplification circuit, a second-stage amplification circuit, a common-mode signal acquisition circuit, a common-mode feedback circuit and a bias circuit. The first-stage amplification circuit has a telescopic structure and receives differential input signals INand IN. The second-stage amplification circuit has a common-source structure and outputs differential output signals OUTand OUT. The common-mode signal acquisition circuit receives differential output signals, and outputs an operational amplifier output common-mode signal V. The common-mode feedback circuit outputs common-mode feedback signals VBand VBto the first-stage amplifier circuit and the second-stage amplifier circuit respectively; The bias circuit outputs a bias voltage VBto the first-stage amplifier circuit, and outputs bias voltages VBand VBto the first-stage amplifier circuit respectively.

Fully-differential two-stage operational amplifier circuit

A multi-curvature convex mirror is comprised of a first reflective surface having a first curvature and defined by a portion of the surface area of a greater sphere and a second reflective surface having a second curvature greater than the first curvature and defined by a portion of the surface area of a lesser sphere that intersects the surface area of the greater sphere. The primary and secondary reflective surfaces are comprised of a series of locations, each defined by an x, y, and z coordinate, determined in accordance with the relationship where 600&#x2266;a&#x2266;1,300 and 100&#x2266;|b&#x2212;a|&#x2266;200.

Multi-curvature convex mirror having an enhanced field of vision

Growing community of inventors

Hangzhou, China

Sheng Huang