Patent ID: 6744044
Filing Date: 2004-06-01
Classification: H01J

Abstract:
A spectrometer comprising:a register for storing a register value; a detector for generating a digital measurement in response to a control signal; a first memory having a plurality of data words, each data word storing a value less than a maximum value, an address input coupled to said register, and a data bus for receiving and transmitting a data value, said first memory storing one of said data values in a data word specified by said register value in response to a write command and said first memory providing said data value corresponding to said register value on said data bus in response to a read command; an adder, responsive to said control signal, for adding said data value on said data bus to said digital measurement to generate a sum value divided into a low order part having a value less or equal to said maximum value and an overflow value; and a second memory for storing at least a portion of said sum value at a location specified by said register value if said overflow value is greater than zero.