Patent ID: 9176513
Filing Date: 2015-11-03
Classification: G05F

Abstract:
1. A high dynamic range exponential current generator with MOSFETs, comprising: a numerator current generator; first and second numerator current generator squaring circuits connected in-line within the numerator current generator; a denominator current generator; first and second denominator current generator squaring circuits connected in-line within the denominator current generator; a single quadrant divider circuit connected between output of the first numerator current generator squaring circuit and output of the first denominator current generator squaring circuit; a bidirectional current mirror circuit connected between output of the second numerator current generator squaring circuit and output of the second denominator current generator squaring circuit; numerator current generator and denominator current generator being biased in a weak inversion region that provides an approximation characterized by a relation, and wherein all components of the exponential current generator are MOSFETs.