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A Switched Capacitors (SC) implementation of fractional integrator is proposed in this paper. Time and frequency domain result tests validate the feasibility and reliability of the SC circuit implementation. A detailed analysis of the influence of the non-idealities is proposed in order to obtain a design fit for Integrated Circuit (IC) implementation. The proposed approach may guarantee a good degree...
A new high-voltage bootstrapped sampling switch with input signal range exceeding 11 times its supply voltage is presented. Proposed switch occupies a silicon area of 250 mum by 160 mum in 0.35 mum twin-well CMOS process with drain extended NMOS (DNMOS) capability. The switch safe input signal range is restricted only by the DNMOS drain terminal breakdown voltage, i.e. 50 V . Implemented switch can...
In this paper we are addressing power efficiency and output ripple of an embedded switched-capacitor based DC/DC Buck Converters. Here we propose to use current pump based switched-capacitor circuit in buck converter. The current pump circuit limits transition current of the switched-capacitors and hence, improves power efficiency and reduces output ripple. We have also proposed an equivalent macro...
A switched capacitor sample-and-hold (S/H) circuit with extended dynamic range beyond the supply voltage is presented. The proposed architecture includes a gate-bootstrapped circuit and an improved flip-around S/H with two selectable configurations. Simulations in a 0.13 ??m CMOS technology show that the new system is capable of sampling a below-ground signal and allows an interface adapter that enhances...
Humidity sensor can be defined as a device, which consists of plastic material whose characteristics change as per the amount of humidity present in the air. Its various application areas include controlling of the climate, storage of food articles, domestic applications etc. The reference paper implemented the humidity sensor uses post-CMOS processing of CMOS fabricated chips to obtain suspended...
Limitations in operation of analog switches at very low voltages have caused many problems in design of these types of switched capacitor circuits and data converters. In this paper by modifying a recently proposed clock boosting circuit, we could obtain a new structure with better performance for very low voltage circuits. This method requires simpler digital circuits in comparison with previously...
A power interface IC is designed and demonstrated to convert and manage power for a wireless tire pressure sensor node. The IC includes two switched-capacitor DC-DC converters to supply power to the various components of the sensor at their appropriate voltages. The design of the two integrated converters is discussed, including the optimization of capacitors and power transistors. The losses due...
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