Transducer Type Detect
, is used to differentiate between ultrasound and FECG
modes.
A probe code circuit detects the connection of an ultrasound transducer and signals
this to the micro.
The micro then opens or closes the relevant analogue switches depending on the
mode selected, to route the appropriate signals through to the A/D converters.
Probe Detect,
detects the presence of one or two US/FECG transducers allowing the
micro to monitor the correct channels as required.
Toco/IUP Input
, a differential amplifier converts the balanced output from the
transducer to single ended mode suitable for micro A/D sampling. A sense line
detects when an IUP system is connected.
A probe code circuit detects the connection of an external contractions or IUP
transducer and signals this to the micro.
28
Issue: 2 Draft
Rev: a
614365
