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A fully integrated THz phase-locked loop (PLL) is proposed. It is consists of a fundamental PLL and a frequency doubler. In order to improve the oscillation frequency and reduced the phase noise, a feedback network composed of buffer amplifiers and capacitors is introduced to the voltage-controlled oscillator (VCO). The wide locking-range divider chain of PLL consists of an injection-locked frequency...
Soft-start strategy is very important for boost converters to guarantee the stability of the output voltage. However, previous methods may cause large initial inrush current and long output voltage settling time. In this paper, a variable ramp-slope with predefined voltage (VRSPV) soft-start strategy is proposed. As a result, one branch of the initial inrush current is successfully eliminated and...
Soft-start is very important for Boost converters to keep output voltage stable. However, previous methods may cause large initial inrush current, big voltage drop, overshoots and long start-up time. In this paper, the conventional resistor capacitor (RC) soft-start scheme is firstly analyzed, and then a novel soft-start strategy by using a variable ramp-slope with predefined voltage (VRSPV) is proposed...
A reconfigurable dual-band low noise amplifier (LNA) for 3.4-3.6 GHz IMT-Advanced and 4.2-4.8 GHz UWB systems is presented in this paper. Two different input matching networks with source-inductive-degeneration cascode configuration are used to switch at two different frequency bands. The parallel capacitors between the input MOSFETs' gate and source are used to optimize noise factor of the LNA. The...
Use of multilevel converter has become popular in recent years. This paper will present a new topology of capacitor-clamp cascade multilevel converter that is derived from two popular topologies. The new concept of the novel capacitor-clamp cascade converter is based on the connection of multiple three-level capacitor-clamp converter modules. Nine level waveform of the proposed multilevel converter...
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