A new method based on adaptive GA (genetic algorithm) and manual experience for sizing and optimizing the CMOS analog circuits is presented in this paper. In the method the simulation tool is called to produce the fitness of every circuit in a population. According to the evaluation of the fitness we can choose the better circuits. By adjusting the sizes of the transistor through GA and restric...

Ultra wideband (UWB) radio communication is capable of a high data rate with low radiated power. A key issue for UWB design is LNA input/output matching over a wide bandwidth: 3 to 5GHz for the lower band and 3 to 10GHz for the entire band. Several UWB LNAs have been proposed in recent years. The UWB CMOS LNA presented in [1] employs a Chebyshev filter for input matching and a source follower f...

A new bandpass amplifier which performs both functions of low-noise amplifier (LNA) and bandpass filter (BPF) is proposed for the application of 900-MHz RF front-end in wireless receivers. In the proposed amplifier, the positive-feedback Q-enhancement technique is used to overcome the low-gain lowQ characteristics of the CMOS tuned amplifier. The Millercapacitance tuning scheme is used to compe...

A new bandpass amplifier which performs both functions of low-noise amplifier (LNA) and bandpass filter (BPF) is proposed for the application of 900-MHz RF front-end in wireless receivers. In the proposed amplifier, the positive-feedback Q-enhancement technique is used to overcome the low-gain lowQ characteristics of the CMOS tuned amplifier. The Millercapacitance tuning scheme is used to compe...

As a design study for the LHC experiments a 'Low Noise Amplifier Shaper' for capacitive detectors is developed. This amplifier is designed in 0.6 um CMOS technology from AMS. The goal was to design an amplifier with a noise contribution of 250 electrons, and 12 electrons per pF contribution from the input capacitor and a relative high gain. A test chip with two versions of the amplifier, a 'rad...

Absrracl A highly linear CMOS RF amplifier and mixer circuits adopting MOSFET transconductance linearization bv linearlv suoemosine several commonTherefore it is very important to linearize MOSFET transconductance for both RF amplifier and mixer circuits. We have shown that multide eated transistor (MGTR) 111 ~ _ . source FET transistors in parallel, combined with some additional circuit techni...

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This paper proposes the use of sampled-data operation in op-amps. The technique favors very low supply voltage and micro-power. After discussing the method at a general level, a possible sampled-data scheme is analyzed. Simulations with a low threshold technology show that a 0.5-V supply is possible. A version of the circuit, which has been integrated by using a standard 0.18-μm CMOS technology...