Patent ID: 6831690
Filing Date: 2004-12-14
Classification: H04N

Abstract:
An electrical sensor apparatus comprising:an array of transducer elements arranged in a (sÃ—t) matrix where s is the number of rows and t is the number of columns, each transducer element adapted to produce an electrical indication in response to external stimuli incident thereon; a plurality t of first stage amplifiers, each first stage amplifier connected to a column of transducer elements; a plurality u of data bus lines, each of the data bus lines requiring a substantially similar predetermined duration of time d to settle during a transfer of an electrical indication to the data bus line, wherein: t>(n*u), where n is a positive integer and every u-th first stage amplifier is connected to the same data bus line, and wherein minimum u is determined by the formula:u=d/T, wherein d is the settling time of a single data bus line and where T is a clock period;a plurality u of second stage amplifiers for generating outputs indicative of the external stimuli; each second stage amplifier being connected to a data bus line; and the plurality t of first stage amplifiers being adapted to drive the data bus lines cyclically so that each data bus line is driven at least once, with an interval between two successive bus drives being at least the predetermined duration of time d.