| 摘要 |
A transmit-receive (T-R) switch for achieving fast T-R switching times while ensuring that the signal strength of a received signal is not fully coupled. A differential amplifier and an inverting amplifier, both having a coupling resistor as an input is used so that nearly all of the input signal is sensed by an operational amplifier. This technique improves transducer voltage transfer (coupling) ratio from 15 - 24 % to about 100 %. The T-R switch architecture is preferably to short-range, single-transducer acoustic ranging systems. |
