Patent ID: 7046971

Claim:
A distortion-correcting circuit comprising: a phase-adjusting section for adjusting the phase of a purposed-wave component to be amplified in input signals; and a distortion-extracting section for extracting a distortion-correcting component obtained by inverting a distortion component generated when amplifying input signals from the input signals to synthesize and output the purposed-wave component output by the phase-adjusting section and the distortion-correcting component extracted by the distortion-extraction section, wherein said phase-adjusting section and said distortion-extracting section are designed at the same input impedance and input signals are input the phase-adjusting section and distortion-correcting section in parallel while the input signals are not actively power-distributed, and wherein the distortion-extracting section includes a first p-type transistor whose gate is connected to an input node to which said input signals are input, a first n-type transistor whose gate is connected with said input node through a first attenuator, a second attenuator connected to the source of said first p-type transistor, a first-stage circuit including an output load for connecting the source of said first p-type transistor with the drain of said first n-type transistor and using a signal at an output node for connecting the output of said second attenuator with the drain of said first n-type transistor as an output, and a second-stage circuit constituted by a first complementary transistor for amplifying the output of the first-stage circuit, and said phase-adjusting section includes a second complementary transistor constituted by a second p-type transistor and a second n-type transistor having the same characteristics as those of the first p-type transistor and first n-type transistor of the first-stage circuit respectively, and a third complementary transistor having the same characteristics as that of the first complementary transistor to amplify an output signal of the second complementary transistor.