Patent ID: 8193837

Claim:
A corner detector comprising: a PMOS threshold voltage detector having a first clock terminal, a first CMOS inverter, a first capacitor, a PMOS threshold voltage function generator and a first voltage output terminal, wherein the first clock terminal means for receiving a clock signal, the first CMOS inverter is electrically connected to the first clock terminal, the first capacitor is electrically connected to the first CMOS inverter, the PMOS threshold voltage function generator is electrically connected to the first capacitor and applied to generate a first formula of voltage signal as a function of threshold voltage, and the first voltage output terminal is electrically connected to the PMOS threshold voltage function generator; and an NMOS threshold voltage detector having a second clock terminal, a second CMOS inverter, a second capacitor, an NMOS threshold voltage function generator and a second voltage output terminal, wherein the second clock terminal means for receiving a clock signal, the second CMOS inverter is electrically connected to the second clock terminal, the second capacitor is electrically connected to the second CMOS inverter, the NMOS threshold voltage function generator is electrically connected to the second capacitor and applied to generate a second formula of voltage signal as a function of threshold voltage, and the second voltage output terminal is electrically connected to the NMOS threshold voltage function generator.