Combiners based on CMOS inverters and application in RF transmitter for wireless sensors

A new Combiner architecture for direct conversion transmitter based on CMOS inverters only and operating in transconductance mode is presented in this paper. Typical applications of an adder and a subtractor of two small amplitude signals are proposed to illustrate the circuit capabilities. The proposed circuit operation has been acted from measurements with the HCC/HCF4069UB Hex Inverter from the SGS Thomson Microelectronics [1].