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This paper describes a generalized multi-frequency impedance transformer capable of providing concurrent matching at arbitrary number of frequencies. A frequency dependent complex load (FDCL) has been considered but the scheme is applicable for real loads as well. The exact analysis of the proposed design results in closed form equations with many independent free variables to cater to the wide range...
In this paper, an interesting dual-frequency behavior of admittance of two sections transmission-line (TSTL) terminated into a real impedance is reported. Furthermore, it is shown that the Monzon two-section dual-frequency impedance transformer is a special case of the reported technique and can be derived from this property itself. In addition, the discovered property leads to a modified dual-frequency...
A dual-band matching network using dual-band coupled line based quarter-wave line is presented. The proposed matching network is capable of providing simultaneous match for frequency-dependent complex loads having different values at two arbitrary frequencies to Z0 (here, 50Ω). A very simple step-wise evolution of the transformer is shown and closed form design equations are obtained. It is to be...
In this paper opamp based resistive transducer circuit is proposed. The circuit can be used in resistive sensing wherein both large and small changes in resistance can be sensed and measured. The circuit gives voltage output in direct proportion to the fractional resistance change. Any non-idealities can be taken care of within the circuit without using any extra elements. In addition, the gain of...
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