Efficiency of Chip-Level Versus External Power Combining
نویسندگان
چکیده
In this paper, we compare two X-band highefficiency switched-mode amplifiers designed around two commercially available packaged MESFET’s, one having a four times larger gate periphery than the other. The amplifiers using the larger and smaller devices are designed to operate in classes E and F, respectively. The smaller device gives 685-mW output power with 7.4-dB gain and 64% overall efficiency. The larger device gives 1.70-W output power with 5.3-dB gain and 57% overall efficiency. This gives an internal (or chip-level) power-combining efficiency for the larger device of 89% in terms of overall efficiency. This is compared to the combining efficiency of circuit and spatial power combining using high-efficiency amplifiers, with the goal of assessing which architecture is the most efficient in terms of total dissipated power (dc and RF).
منابع مشابه
Power Aware External Bus Arbitration for System-on-a-Chip Embedded Systems
Power efficiency has become a key design trade-off in embedded system designs. For system-on-a-chip embedded systems, an external bus interconnects embedded processor cores, I/O peripherals, a direct memory access (DMA) controller, and off-chip memory. External memory access activities are a major source of energy consumption in embedded systems, and especially in multimedia platforms. In this ...
متن کاملDesign of a Fuzzy Controller Chip with New Structure, Supporting Rational-Powered Membership Functions
In this paper, a new structure possessing the advantages of low-power consumption, less hardware and high-speed is proposed for fuzzy controller. The maximum output delay for general fuzzy logic controllers (FLC) is about 86 ns corresponding to 11.63 MFLIPS (fuzzy logic inference per second) while this amount of the delay in the designed fuzzy controller becomes 52ns that corresponds to 19.23 M...
متن کاملTreatment of Pediatric Open Femoral Fractures with External Fixator Versus Flexible Intramedullary Nails
Background: In children, inappropriate treatment of open femoral fractures may induce several complications. A few studies have compared the external fixator with flexible intramedullary nails in high-grade open femoral fractures of children. The present study aims at comparing results of these two treatment methods in open femoral fractures. Methods: In this descriptive analytical study, 27 ...
متن کاملReducing Power using Body Biasing in Microprocessors with Dynamic Voltage/Frequency Scaling
Body biasing has been demonstrated to be effective in addressing process variability in a variety of simple chip designs. However, for modern microprocessor ICs with multiple cores and dynamic voltage/frequency scaling (DVFS), the use of body biasing has significant implications. For a 16core chip-multiprocessor implemented in a high-performance 22 nm technology, the body biases required to mee...
متن کاملA 25Gb/s 170μW/Gb/s Optical Receiver in 28nm CMOS for Chip-to-Chip Optical Communication
A low-power high-speed optical receiver in 28nm CMOS is presented. The design features a novel architecture combining a low-bandwidth TIA front-end, double-sampling technique and dynamic offset modulation. The low-bandwidth TIA increases receiver’s sensitivity while adding minimal power overhead. Functionality of the receiver was validated and the design is compared with a conventional 3-stage ...
متن کامل