the external transducer 32 via rf transmission and is fed to the electronic module 36 for signal processing storage and later analysis fig5 is a block diagram illustrating the circuitry contained within the housing 20 of the implant device the output signals from the aforementioned pressure temperature flow transducers can readily be separated into two channels one for carrying the pressure information and the other for carrying temperature information by appropriate filtering techniques it being recognized that the output signal from the pressure sensor will be of a significantly greater frequency than that from the temperature sensor hence in fig5 both a pressure sensor 50 and a temperature sensor 52 are illustrated to indicate the dual channel nature even though a single transducer device may be utilized the analog output signal from both the pressure sensor 50 and the temperature sensor 52 are applied to an analog to digital converter forming a part of the on board microprocessor 54 the microprocessor 54 includes an address bus 56 a data bus 58 and a control bus 60 to which are connected a rom memory 62 a ram memory 64 and an input output interface 66 rom 62 conventionally stores a program executable by the microprocessor 54 while ram 64 may store programmable constants and intermediate data developed during the execution of.