Download Precision Temperature Sensors in CMOS Technology (Analog by Micheal A.P. Pertijs, Johan Huijsing PDF

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By Micheal A.P. Pertijs, Johan Huijsing

This ebook describes the research and layout of precision temperature sensors in CMOS IC know-how, concentrating on so-called clever temperature sensors, which supply a electronic output sign that may be without problems interpreted through a working laptop or computer. The textual content exhibits how temperature features can be utilized to procure a correct electronic temperature analyzing. The ebook ends with an in depth description of 3 prototypes, considered one of which achieves the easiest functionality said up to now.

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The efficiency of the Class E amplifier is independent of the supply voltage and thus, changing the power supply of a Class E amplifier is an efficient means to change the amplitude of the output RF signal. This idea is further elaborated in chapter 5. Finally, the application of the Class E amplifier is not limited to RF amplification. It can also used at lower frequencies where it serves as an efficient DC-to-AC power converter to feed implantable and wearable biomedical devices, as shown in [Schu98] and [Catr04].

For a high voltage vacuum tube amplifier, the load resistor will be relatively high for a certain output power and this makes it easier to achieve a high quality LC network. In low voltage technologies, the load resistor will also be low to achieve sufficient output power. As a consequence, the quality factor of the LC network will be reduced which makes the design of a Class B or Class C power amplifier a difficult task. Finally, the push-pull Class B amplifier is not tackled here, but an elaborate discussion can be found in [Crip99] and [Keni00].

The reason is the presence of the higher harmonics in the output waveform. The calculation is as follows. The output voltage is assumed to be a square wave with an amplitude of VDD . 91) Since the transistor is acting as an ideal switch, no current-voltage overlap is present, the conversion efficiency must be 100% and therefore, the DC power consumption must equal to Po,tot . 92) 43 Mobile Communication Systems and Power Amplification saturated region 5 100 0 80 −5 60 50% −10 40 −15 20 −20 0 −20 −10 0 10 norm.

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