Patent ID: 6084440
Filing Date: 2000-07-04
Classification: G11C

Abstract:
A distortion canceling circuit for canceling sampling harmonic distortion that is produced in addition to an output signal while sampling an input signal in a main sampling leg of a sample and hold circuit, said distortion canceling circuit comprising:an auxiliary sampling leg that produces canceling harmonic distortion that corresponds to at least a portion of said sampling harmonic distortion produced in said main sampling leg, wherein said auxiliary sampling leg comprises at least one input switching mechanism that generates at least a portion of said canceling harmonic distortion that receives said input signal at an input to said at least one input switching mechanism and that controls when said input signal is available at an output of said at least one input switching mechanism; anda combining circuit that combines said sampling distortion and said canceling harmonic distortion so that said canceling harmonic distortion cancels said at least a portion of said sampling harmonic distortion while only canceling a portion of said output signal.