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A newly structured 150GHz divider-by-2 injection-locked frequency (ILFD) is designed in a 65-nm CMOS technology. This ILFD uses a new adjustable inductor tuning technique and time-interleaved dual-injection method to improve the frequency division range. A 1-bit binary-weighted switch-capacitor is also used to widen the locking range. From the post-layout simulation result we can see that four self-resonance...
A four-stage common-source (CS) amplifier is designed in a 65 nm CMOS process for the unlicensed D-band. Each stage bases on the technique of coupled transmission line (T-line) neutralization to achieve high performance. Transmission line is also used to provide inter stage impedance match together with transformers. T-junction network is used for input and output matching. With the proposed techniques,...
A new type of tri-axial piezoelectric accelerometer is proposed in this study. It consists of a seismic mass and four cantilever beams that is distributed in a shape of X. Analytical model and FEM analysis were conducted to study its charge sensitivity and the fundamental/first order resonance frequency in the Z-axis, X-axis and Y-axis direction. The errors between the calculated results from analytical...
This paper presents a resonantly-driven and high-performing piezoelectric micropump, which is favorable for the fuel delivery system. The micropump consists of a resonance-driven vibrator, two simple polydimethylsioxane (PDMS) check valves and compressible spaces. The PDMS check valve increases the working stability and reduces the leakage rate. The performance of the micropump is significantly improved...
A wideband printed dual-antenna for mobile terminals is proposed. The dual-antenna, consisting of two symmetric antenna elements and a protruded ground, is printed on a printed circuit board. The proposed antenna is analyzed in detail for better understanding. A prototype shows that the measured − 10 dB impedance bandwidth is 1.06 GHz (1.68–2.74 GHz) and the measured mutual coupling is lower than...
Phase noise of oscillators can be improved through noise filtering. This paper presents a transformer-based harmonic filtering technique to improve the phase noise performance of the fully differential CMOS LC oscillators. The primary and secondary of the transformer are placed at the sources of NMOS and PMOS differential pairs, respectively. Due to the extra degree of freedom introduced by the transformer,...
In this paper, a novel methodology to fully automate inductor model extraction with guaranteed physical scalability is proposed. A consistent automatic frequency range selection mechanism is added to the direct extraction flow of a 2-π model to ensure the underlying physical trend and scalability. The method is validated with 45 inductor measurements with frequency up to 20 GHz, both good accuracy...
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...
This paper presents the design and analysis of a high linearity reconfigurable down-conversion mixer for IMT-Advanced (3.4~3.6 GHz) and UWB (4.2~4.8 GHz) applications. The proposed mixer is based on folded double-balanced Gilbert cell which is well-known for low voltage, simplicity and well-balanced performances. Capacitors are added parallel with the current generators to achieve the optimal IIP2...
The objective of this study is to assess the cerebral oxygenation oscillations in subjects with cerebral infarction (CI) based on the wavelet transform of near infrared spectroscopy (NIRS) signals. A total of twenty subjects were recruited from a local hosipital to participate in this study. The subjects lay in the supine position and cerebral oxygenation signal was monitored for 20 minutes from the...
A dual-band bandpass filter using parallel doubly coupled structure with loading capacitance is designed for dual-band applications at 17/35 GHz. New coupling structure is proposed to replace the normal counterparts. It can provide two passband respectively in Ku-band and Ka-band. By using the capacity-load structure, the slow-wave effect occurs in this filter, which can reduce the circuit size and...
This paper presented an improved design on a 121.4 MHz overtone TCXO which exhibited a low phase noise. The temperature compensation approach differs from conventional ones such as adding series inductances or frequency multiplication. It makes of a 100 MHz 5th overtone crystal oscillator mixed with the frequency of a 21.4 MHz fundamental mode voltage controlled crystal oscillator (VCXO). And then,...
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