Low voltage differential signal drive circuit for data transmission, has drive cell that controls current supplied to current mirror circuit based on comparison of output of mirror circuit with reference signal

摘要

The drive cell (DC) has a pair of operation amplifies that compares signal output by nodes (ND1,ND6) of current mirror circuit (MC) with reference signal. When the signal output by current mirror circuit exceeds reference value, the current supplied to current mirror circuit is controlled so that differential output signal is maintained at predetermined value.