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Fully integrated optoelectronic interfaces in CMOS technology are a very interesting option for optical smart sensors because they are a cost-effective and compact solution. However, CMOS standard n-well/p-bulk differential photodiodes (DPDs) are the bottleneck in this field due to their inherent limited bandwidth which falls below 10MHz in 65nm CMOS. This work presents a new equalization approach...
This paper presents an optical receiver for short reach applications through low-cost plastic optical fiber. The limited bandwidth caused by the fiber and the external photodiode is compensated by a new adaptive equalizer based on the spectrum balancing technique. A clock and data recovery circuit is included that minimizes jitter and metastability using a new multi-level bang-bang architecture. The...
A high-level design approach for single-resistance- controlled-oscillators (SRCOs) is introduced by applying symbolic analysis to derive behavioral models of unity-gain cells, e.g. current and voltage followers. The followers are designed by using standard CMOS technology of 0.35 mum and their behavior is approached by a first-order fully-symbolic expression which is in good agreement to SPICE simulations...
An improved implementation of the Chua's chaotic oscillator is proposed. The new realization is based on the use of voltage and current followers to construct the active three-segment voltage-controlled nonlinear resistor. The proposed circuit is optimized for low-voltage operation with plusmn1.5 V, by using standard CMOS technology of 0.35 mum AMS. The HSPICE simulations performed in both time and...
An automatic method is proposed to design CMOS compatible voltage followers (VFs) by applying genetic algorithms. It is described how an automatic system can deals with huge search spaces to design practical VFs by performing evolutionary operations from nullator-based descriptions. The proposed method consists of three main steps: generation of the small-signal circuitry, addition of biases, and...
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