A circuit for a pixel site in an imaging array includes a light-detecting
element to convert incident light to a photocurrent and a reset
transistor, operatively connected to the light-detecting element, to
reset a voltage associated with the light-detecting element. The reset
transistor hard resets the voltage associated with the light-detecting
element and soft resets the voltage associated with the light-detecting
element after the generation of the hard reset of the voltage associated
with the light-detecting element. A pixel voltage of a column or row line
is also measured by hard resetting the column or row line voltage to a
first predetermined voltage; soft resetting the column or row line
voltage to a first pixel voltage; hard resetting the column or row line
voltage to a second predetermined voltage; soft resetting the column or
row line voltage to a second pixel voltage; and determining a difference
between the first and second pixel voltages, the difference being the
measured pixel voltage.