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This work demonstrates a new integrated inverse class E amplifier circuit, employing a pHEMT switching device and fully integrated output network for pulse shaping. The circuit is particularly suitable for full integration, since it does not need any RF choke for biasing, and no DC blocking capacitor is needed between the switch and the output network parallel resonance circuit. The back plate capacitances...
This paper discusses the effects of unequal signal delays in the input network of a multi-finger transistor in a switching RF power amplifier. In a design that employs a distributed transistor, the driving signal must be delivered to each transistor finger by conductor segments that usually are unequal in length. The effects of the consequent non-simultaneous switching are demonstrated with three...
This paper demonstrates a tuned power amplifier designed to operate at 1.6 GHz frequency. The basis of the design is inverse class E topology where the DC block is placed in a new position so that the blocking capacitor can be smaller. Further, very high currents flowing into the output resonator had to be taken into account in the design process of a integrated circuit (IC). Wide inductor lines and...
In this paper, we present the design of the readout and control circuitry for a four pixel digital camera to give the graduate students experience in analogue and digital integrated circuit design. The main objective of this design project is to give the students an insight into design methods used in the industry. This design project is also targeted to give an opportunity for the students to learn...
A differential voltage controlled oscillator (VCO) circuit employing PMOS transistors in the gain stage is described. The circuit topology minimizes the amount of fixed parasitic capacitance in the tank circuit. The gain stage transistors employ virtual ground planes for increasing the Q value of the drain-bulk capacitances. Tuning of the oscillation frequency is based on the voltage dependence of...
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