| 摘要 |
PURPOSE: An apparatus for generating ramp signals is provided to output two same ramp signals without affecting a chip area and power consumption even if input capacitors are mismatched. CONSTITUTION: An apparatus for generating ramp signals generates ramp signals for converting analog pixel signals of a CMOS(Complementary Metal-Oxide-Semiconductor) image sensor into digital pixel signals. A first integrator(100) receives first input voltage for outputting a first ramp signal(Aout) according to a first input signal(A) and a reference voltage signal(Vinit). A second integrator(200) receives second input voltage for outputting a second ramp signal(Bout) according to a second input signal(B) and the reference voltage signal. An exchanging unit(300) exchanges first and second input capacitors(Ca,Cb) of the first integrator and the second integrator according to clocks. |
