Mei‐Ling Yeh, Yao‐Chian Lin and Wei‐Chieh Chang
The purpose of this paper is to design a low phase noise and high figure of merit, fully integrated, voltage‐controlled oscillator (VCO) which was fabricated in TSMC CMOS 0.18‐μm…
Abstract
Purpose
The purpose of this paper is to design a low phase noise and high figure of merit, fully integrated, voltage‐controlled oscillator (VCO) which was fabricated in TSMC CMOS 0.18‐μm 1P6M process.
Design/methodology/approach
A differential PMOS cross‐coupled architecture VCO with the capacitive feedback technology was designed to increase the linearity of frequency tuning range and decrease the phase noise. Varactor determining the performance of tuning range is also a key component in the design of VCO. The authors adopt the accumulation‐mode MOS varactor. The output spectrum and the phase noise are measured by E5052A spectrum analyzer.
Findings
The VCO is successfully fabricated in TSMC RF CMOS 0.18um 1P6M process. The measured tuning range is from 10.875 GHz ∼ 11.1 GHz with control voltage from 0 to 1.5 V. The measured phase noise is as low as −120.42 dBc/Hz at 1 MHz offset and the high FOM is −189.5 dBc/Hz. The output spectrum is −10.51dBm with center oscillator frequency of 10.942 GHz. The core circuit without buffer consumes power of 15 mW from a 1.8 V supply voltage.
Originality/value
This paper shows a fully integrated CMOS LCVCO architecture using capacitive feedback technology with low phase noise and high figure of merit for OC‐192 SONET applications.
Details
Keywords
Tsung-Sheng Chang and Wei-Chieh Liu
Digital games have not only surged in popularity but also have sparked a renaissance, catapulting virtual adventures into the realm of cultural phenomena. It has spilled over as…
Abstract
Purpose
Digital games have not only surged in popularity but also have sparked a renaissance, catapulting virtual adventures into the realm of cultural phenomena. It has spilled over as countless individuals find themselves drawn to the tangible pieces of the worlds they love, mulling over the procurement of game merchandise and memorabilia. These items are more than mere collectibles; they are emblems of unwavering enthusiasm for game culture. This study employs the consumer culture theory (CCT) to investigate game players’ propensity to purchase merchandise products.
Design/methodology/approach
In this study, social media and online forums were used to collect samples from Taiwan, obtaining 311 valid responses. Partial least squares (PLS) was employed to analyze the research model.
Findings
The findings underscore the significance of loyalty as a critical factor affecting individuals’ ethnocentrism and cosmopolitanism attitudes, which also significantly impact the likelihood of players purchasing game merchandise products.
Originality/value
Based on CCT, this study explores game players’ willingness to purchase game merchandise. In Asia, transforming digital game content into peripheral products is a marketing strategy. This study holds practical and academic implications, contributing to the advancement of research in this field.
Details
Keywords
Wei Chieh Liang, Yao Chun Tsao, Wen Kuei Chen, Hsing Chau Tseng and Ke Jian Yu
– The purpose of this paper is to integrate Modigliani-Miller (MM) theory and stock repurchases strategy to procure a practical concept for capital decision.
Abstract
Purpose
The purpose of this paper is to integrate Modigliani-Miller (MM) theory and stock repurchases strategy to procure a practical concept for capital decision.
Design/methodology/approach
No-arbitrage proof model deduction was used in this study. The authors consider corporate tax and funding sources as two crucial factors drawn in the model. The paper derives some propositions by trichotomy property and keeps the key assumptions of MM Capital Structure Theory.
Findings
There are two different effects on firm's value through stock repurchases. The positive effect occurs on firm's value through stock repurchases with loan fund. And the negative impact exists on firm's value through stock repurchases with idle fund.
Research limitations/implications
Notably, in the real world there are three limitations with such an arbitrage transaction (Stulz, 2000). The first one is the default risk, and the second one is transaction costs and the last one is the perfect credit market assumption. In the near future, the authors suggest it would be interesting to involve the interest rate factor and contingent tax variable into our model.
Originality/value
On the basis of no arbitrage opportunity, this paper considers both trichotomy property and MM theory. It proves the share repurchase strategy should be financed by borrowing fund. In contrast, share repurchase should not be executed with idle fund because of opportunity cost.