LC-circuit calorimetry

Bossen, O.; Schilling, A.
September 2011
Review of Scientific Instruments;Sep2011, Vol. 82 Issue 9, p094901
Academic Journal
We present a new type of calorimeter in which we couple an unknown heat capacity with the aid of Peltier elements to an electrical circuit. The use of an electrical inductance and an amplifier in the circuit allows us to achieve autonomous oscillations, and the measurement of the corresponding resonance frequency makes it possible to accurately measure the heat capacity with an intrinsic statistical uncertainty that decreases as ∼tm-3/2 with measuring time tm, as opposed to a corresponding uncertainty ∼tm-1/2 in the conventional alternating current method to measure heat capacities. We have built a demonstration experiment to show the feasibility of the new technique, and we have tested it on a gadolinium sample at its transition to the ferromagnetic state.


Related Articles

  • OTAs-based Positive/Negative Floating Inductance Simulator. Petchmaneelumka, Wandee // International MultiConference of Engineers & Computer Scientists;2009, p1439 

    This paper presents a method to realize floating inductance simulator using Operational Transconductance Amplifiers (OTAs). Both positive and negative floating inductances can be achieved without changing the circuit topology. The realization method is based on the use of commercially available...

  • Take The Right Steps To Achieve Accurate Measurements. Tuite, Don // Electronic Design;3/31/2005, Vol. 53 Issue 7, Supplement p3 

    This article presents steps to achieve accurate electric measurements. Current measurements are used in a variety of equipment for control or safety functions. Measuring the voltage drop across a low-value resistor is the most common method of measuring the current flowing in a circuit. Ammeters...

  • Realization of New Electronically Controllable Grounded and Floating Simulated Inductance Circuits Using Voltage Differencing Differential Input Buffered Amplifiers. Prasad, Dinesh; Bhaskar, D. R.; Pushkar, K. L. // Active & Passive Electronic Components;2011, p1 

    A new active circuit is proposed for the realisation of lossless grounded and floating inductance employing Voltage Differencing Differential Input Buffered Amplifiers (VD-DIBAs). The proposed grounded simulated inductance circuit employs two VD-DIBAs and a single-grounded capacitor whereas the...

  • About implementing an inductor by the means of gyrators. Tonţ, Gabriela; Vlădăreanu, Luige; Munteanu, Radu Adrian; Tonţ, Dan George // Journal of Electrical & Electronics Engineering;Jun2009, Vol. 2 Issue 1, p100 

    Take into account the entrance equivalent impedance of gyrators, by connecting a condenser to output is possible simulate a lossless inductor, which can be grounded inductor or floating inductor. The gyrators behavior of a class of two-ports structured on operational amplifiers and resistors is...

  • Electronically Tunable Third-Order Quadrature Oscillator Using CDTAs. Jiun- Wei Horng; Hung Lee; Jian-Yu Wu // Radioengineering;6/2/2010 Part II of II, Vol. 19 Issue 2, p326 

    A current/voltage-mode third-order quadrature oscillator based on current differencing transconductance amplifiers (CDTAs) is presented in this paper. Outputs of two current-mode and two voltage-mode sinusoids each with 90° phase difference are available in the quadrature oscillator circuit....

  • CFOA-Based Lossless and Lossy Inductance Simulators. KAÇAR, Firat; KUNTMAN, Hakan // Radioengineering;Sep2011, Vol. 20 Issue 3, p627 

    Inductance simulator is a useful component in the circuit synthesis theory especially for analog signal processing applications such as filter, chaotic oscillator design, analog phase shifters and cancellation of parasitic element. In this study, new four inductance simulator topologies...


    The article describes a circuit which can measure the settling time of fast amplifiers. Settling time is defined as the elapsed time from an input application until the output arrives at and remains within a specified error band around the final value. The three distinct components of settling...

  • Low-noise differentiator preamplifier for photogenerated signals. Rovati, Luigi; Docchio, Franco // Review of Scientific Instruments;Apr99, Vol. 70 Issue 4, p2169 

    Proposes a low-noise preamplifier for use in performing a derivative of photogenerated signals. Components of the preamplifier; Breadboard circuit implementation; Noise measurements.

  • Experimental Synchronization of Two Unidirectionally Coupled Double Scroll Circuits. Volos, Ch. K.; Kyprianidis, I. M.; Stouboulos, I. N. // AIP Conference Proceedings;1/21/2010, Vol. 1203 Issue 1, p403 

    In this work, we have studied the case of chaotic synchronization between two identical double scroll chaotic circuits, unidirectionally coupled via a linear resistor and we found out, that the system was synchronized for different values of the coupling resistor. The nonlinear element of the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics