Transmitter implemented in 0.18um CMOS process technology

This paper presents an amplitude modulation transmitter for 50 MHz application with low power consumption. The transmitter consists of Gilbert cell mixer, cross coupled with symmetric load voltage controlled oscillator, two stage operational amplifier and a high pass filter implemented in TSMC CMOS 0.18μm process. A 200 mV RF input of 50 MHz and 500 mV LO output of 1.5 GHz are applied at both RF and LO ports of the mixer with conversion gain of 14.25 dB results to a 300 mV IF output of 1.2 GHz. The reference voltage V_dd = 1.8 V, the tuning range of oscillator is 0 to 2 GHz and the amplifier has a gain of 42.1 dB, phase margin of 56 degrees, unity gain bandwidth of 1.43 GHz and slew rate of 291 V/μs. The overall power consumption is 74.3 mW and a chip size of 9.68 nm². The chip is connected to an I/O pad with rectangular pad frame of size 0.46 um².