Most ultrasonic transmitters and receivers are built around timer IC 555 or complementary metal-oxide semiconductor (CMOS) devices ... 1: Ultrasonic Transmitter circuit The crystal-controlled ...

Abstract: A wireless transmitter using RF pulse-width-modulation (PWM ... The transmitter has been implemented in a 130-nm CMOS process. The measured peak output power and power-added-efficiency (PAE) ...

The schematic diagram of the RF link is shown below, the circuit is very simple and can be built very easily. At the left hand side we can see the 433MHz RF Receiver and on the right hand side we can ...

With 40mW of RF output, it can be used to transmit voice or music up to hundred metres. The circuit diagram of the 96MHz crystal-locked simple FM transmitter is shown in Fig. 1. The circuit is built ...

Abstract: In this brief, a self-calibrated two-point delta-sigma modulation technique for a CMOS RF transmitter is proposed for ... performance against PVT variations without using any additional ...

However with direct conversion transmitters, the implementation of a cartesian feedback is easier especially because there is only one RF frequency to deal with. Fig 3 shows the block diagram of the ...