A novel integrated spatial filtering detector chip with variable multi-valued weighting functions

A novel integrated spatial filtering detector chip was introduced in this paper through the comparison with the conventional spatial filtering detectors. We designed and fabricated a novel integrated spatial filtering detector chip with variable multi-valued weighting function using CMOS 0.35μm process. This chip has 7-bit signed weight values and a weighting control circuit though the external interface with the PC. The multiplication of the frequencies is available from the dividing the weighting function of the chip. In order to con.rm the validity of this chip, a simple velocity measurement was achieved. Experimental results show multiplied frequency ratio regarding to the reference frequency which are in proportion to the velocity of the measuring object