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A novel high speed and tunable transconductor suitable for analog and mixed-signal fuzzy circuits operating in current mode and a high linear MIN circuit are proposed. Using this OTA, we construct are high speed Gaussian and trapezoidal-shaped fuzzifier and implement S-shaped and Z-shaped function with all parameters (slop, width, and position) independently and continuously tunable, and excellent...
In the paper we consider architecture of an analog dual delay locked loop (DLL). It uses an simply-implementable coarse delay line to push the loop close to lock state, and a fine programmable delay line to make small adjustments to the output phase. Both coarse- as well as fine-delay line are implemented as a cascades of variable-delay elements based on single-ended Schmitt triggers. For the correction...
This paper describes design of readout circuit destined for NMOS terahertz detectors. The proposed architecture bases on chopper amplifier and instrumentation amplifier concepts. The main goals were to achieve high gain (max. 100 dB) and to enable proper operation with NMOS-based THz detector. For the research needs three different architectures of chopper amplifier have been developed. The designed...
We present a design and simulation results of an integrated circuit dedicated to recording and detection of a broad range of biomedical signals. The chip is designed in a 180nm CMOS technology and occupies 1.5×1.5 mm2. It consists of 8 channels responsible for amplification, filtration, and detection of biomedical signals. Main parameters of the single recording channel such as a voltage gain, frequency...
The paper describes structure and simulation results of the novel ring oscillator designed in UMC CMOS 0.18 µm (1.8 V). Frequency generated by the oscillator is tuned by scaling the supply voltage, additionally ring length is digitally controlled. Presented ring oscillator has very wide tuning range (250 MHz–2.1 GHz) with small current consumption (34–689 µA).
The paper presents a form of the electrothermal model of the ferromagnetic core for SPICE and the way, in which parameters of the model are determined. The manner of determining magnetic, geometric and thermal parameters of this model is described. The correctness of the proposed model and the manner of determining the values of parameters are verified by comparing the calculated and measured characteristics...
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