An experimental investigation of high-temperature dc SQUID amplifier connected in series with a high-Tc superconductor (HTS) thin-film band-pass filter is presented. The SQUID amplifiers are designed with microstrip input coils and fabricated on bicrystal substrates of zirconia and sapphire with different misorientation angles of 24 and 37 . SQUID parameters are optimized to attain 50-X input i...

Employing 130-nm IBM CMOS model parameters, the design of a power-efficient single-stage microwave amplifier is presented in this paper. An optimization technique for the amplifier forward gain is proposed through careful selection of process elements without compromising the architecture’s high degree of isolation and resistance to reflection-loss. A novel mechanism to match port-impedances of...

This paper proposes a wideband common-gate LNA using capacitive feedback. The transconductance of the proposed LNA can be enlarged and noise figure can be improved while the conventional common-gate LNA has to use a smaller transconductance for the input impedance matching. In the experimental results using a 0.18-μm CMOS technology, the gain is 13.4 dB, NF is 2.7 dB, IIP3 is −7 dBm at 0.8GHz, ...

This paper presents an ultra-wideband (UWB) low noise amplifier (LNA) consuming 2.2-mW core dc power for 6-8.5GHz wireless applications. A common-gate input stage is cascaded with a common-source second stage to perform input impedance matching and wideband stagger-tuning amplification, while the current-reuse topology minimizes the dc power dissipation. The design method used to achieve flat-g...

This paper presents a temperature measurement system without the input buffer. A voltage follower or a buffer is required to minimize the influence of the ADC input impedance in the thermistor temperature measurement system. In such system, a high performance operational amplifier is usually required to prevent the noise and distortion due to the additional circuit. Negative power is also neces...

This paper describes a new electronically tunable three inputs and single output voltage-mode universal biquadratic filter based on simple CMOS operational transconductance amplifiers (OTAs) and grounded capacitors. The proposed configuration provides lowpass, highpass, bandpass, bandstop and allpass voltage responses at a high impedance input terminal, which enable easy cascadability. Addition...

In this paper, the design of linear amplifiers for current sources with very low, or voltage sources with very high impedance is discussed. In designing negative-feedback amplifiers for these sources, the loopgain is often low as a result of the source impedance, thus making it difficult to obtain a sufficiently high bandwidth. Here, it is proposed to use CB or CC stages in front of a negative-...

In this paper, new configurations of voltagemode biquadratic filters with single input and three outputs are presented. The proposed configurations employ a DDCC (Differential Difference Current Conveyor) variant namely the Unity-Gain Sum Difference Amplifier (UGSDA) and use two operational transconductance amplifiers (OTAs) and two grounded capacitors. The circuits have the following advantage...

We present a novel multifunction inverse biquad configuration based on current feedback operational amplifiers (CFOAs) and grounded passive elements. The proposed scheme can be used to realize inverse lowpass, inverse bandpass and inverse highpass filter functions. The relevant coefficients of the inverse filters are orthogonal adjustable by independent passive elements. All the passive element...

AbstructSmall-signal Thevenin and Norton equivalent circuits seen looking into each terminal of the BJT and the FET are described. The application of these! circuits to writing by inspection the expressions for gain, input resistance, and output resistance of multistage amplifiers is demonstrated. The application of the circuits to the noise analysis of devices is illustrated by the calculation...