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The emitter series resistance is a very important parameter for bipolar transistors since it can have a significant impact on both the DC and high-frequency characteristics of transistors. Its accurate determination is quite difficult due to the complicated emitter material stack and the lack of suitable test structures. Thus, extraction methods that rely on transistor terminal characteristics must...
The concept of the measurement technique is to separate the paths by at least two directions; one is the current path, where the drain current flows, and the other is the non-current path, where the voltage is measured with the connection to the high-Z gate of the monitor circuit. The proposed measurement technique has been validated by HSPICE simulation.
An on-chip buck converter with 3D chip stacking is proposed and the operation is experimentally verified. The manufactured converter achieves a maximum power efficiency of 62% for an output current of 70mA with a switching frequency of 200MHz and a 2x2mm on-chip LC output filter in 0.35mum CMOS. The use of glass epoxy interposer to increase the maximum power efficiency up to 71.3%, and the power efficiency...
The next generation of wireless communication is a ubiquitous radio system concept, providing wireless access from short-range to wide-area, with one single reconfigurable and adaptive system for all envisaged radio environments. This paper presents the design approach of RCO (reconfigurable concurrent oscillator) that simultaneously generates two or more signals of different frequencies that eliminate...
In deep submicron era, to prevent larger amount of SRAM from more frequently encountered overheating problems and react accordingly for each possible hotspots, multiple ideal run-time temperature sensors must be closely located and response rapidly to secure system reliability while maintaining core frequency. This paper presented a method to extract run-time temperature information from multiple...
A transistor logic memory module based on the Royer oscillator type magnetic multivibrator is described, in which six coils tightly wound around a HTcSC thin disk core are connected to two switching transistors. Oscillation of the module is initiated by applying a pulse current to a coil, and the phase of the oscillation is controlled by the polarity of the trigger pulse. That is, this module is a...
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