an integrated single channel or multi - channel ultrasound transmitter that minimizes the number of input connections to a controller such as an fpga , field programmable gate array , or a custom integrated circuit in an ultrasound system . the method is accomplished by integrating , in low voltage logic , a means to store and or program the patterns required for the transmitter output . the number of logic input connections can be further reduced by further integrating , in low voltage logic , programmable individual time delays and frequency divider for each transmitter output .