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For implanted neural-sensing devices, one of the remaining challenges is to transmit stable power/data (P/D) transmission for high spatiotemporal resolution neural data. This paper presents a miniaturized implantable 128-channel wireless neural-sensing microsystem using TSV-embedded dissolvable μ-needle array, a flexible interposer and 4 dies by 2.5D/3D TSV heterogeneous SiP technology. The 4 dies...
A novel four-element MIMO antenna operating at millimeter wave band is proposed. The half-mode substrate integrated waveguide (HMSIW) cavity backed slot antenna is used as the element to realize a compact structure, high radiation efficiency and interelement isolation. The simulated relative impedance bandwidth is 29.6% from 23.5–31.0GHz for S11<−10dB. And the isolation is lower than −22dB across...
This paper aims at providing explicit, closed-form solutions to the error probability performance analysis of digital communications over fading channels. This is achieved by first deriving a family of new upper bounds on the Gaussian Q-function Q(x), which is given by a sum of products of the exponential function and c/x where c is a constant. The bounds obtained can be made arbitrarily tight as...
In this paper, a three-stage power amplifier (PA) designed for V-band applications is presented. The proposed PA adopts common-source topology for each stage and is implemented in the CMOS 90-nm process technology. This V-band PA achieves a small signal gain of 11.9dB and a saturated output power of 7.6dBm at the 60GHz operating frequency. The measured peak power added efficiency (PAE) is 4.77%, and...
The aim of this paper is presented A Gilbert mixer with passive balun for 18 GHz application. It was used Taiwan Semiconductor provided by TSMC CMOS 0.18 µm process. We proposed mixer consists of Gilbert Cell, balun and the IF buffer amplifier. Finally, at the operation voltage of Vdd = 1.8 V, RF frequency =18 GHz, LO frequency =17 GHz, the conversion gain is about 8.6 dB, input P1dB and power consumption...
A battery-free nano-power buck converter with a proposed dynamic on/off time (DOOT) control can achieve high conversion efficiency over a wide load range. The DOOT control can predict the on/off time at different input voltages without a power consuming zero current detection (ZCD) circuit, as well as suppress static power in idle periods. To adapt to the fluctuations in a harvesting system, the proposed...
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