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To receive datashfet and publication datasheeg for Active and Passive Electronic Datasheer, enter your email address in the box below. This is an open access article distributed under the Creative Commons Attribution Licensewhich permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. A new dual-input differential input icl88013 integrator using a current differencing buffered amplifier CDBA is proposed. A multiplier element is appropriately used in the circuit whose control voltage tunes the integrator time constant electronically.

The design of a voltage controlled quadrature oscillator VCQO based on the proposed integrator had been satisfactorily implemented. The CDBA offers several advantageous features viz.

We propose here a new electronically tunable differential integrator using a CDBA; the control voltage of a multiplier element, incorporated suitably in the circuit, tunes electronically. The ICL device is a four-quadrant analog multiplier whose output is proportional to the electronic product of two input voltage signals with a transmission constant [ 78 ].

MHzand improved versatility make adtasheet quite suitable for analog signal conditioning and active filter design applications.

Ic8l013 design of a voltage controlled quadrature oscillator VCQO had then been implemented using the double integrator loop. The proposed circuit is shown in Figure 1. The nodal equations characterizing an ideal CDBA element are [ 1 ]. We therefore get the realisability conditions for a true differential integrator, putting ; to 4, as here we assumed. With 2 in 1an ideal dual-input integrator function is obtained as where if then with Hence the time constant is electronically tunable for the range?

With a nonideal CDBA device, these design equations would alter.


The device imperfections may be expressed in terms of some port mismatch ratios [ 2 — 4 ] given by the relations The and terminals of the CDBA however are internally grounded; hence In the literature, the mismatch ratios are postulated in terms of some low-magnitude error [ 2 — 6 ] quantities given byand for an ideal device the errors vanish.

By Reanalysis assuming finite quantities, we get a modified transfer equation. The realisability conditions for a true differential integrator now modify to Here we neglect the error products since ; thus.

The active – sensitivity may be estimated after writing for simplicity, which gives since [ 41112 ]. Effect of the multiplier device nonideality may be derived by expressing so that we can effectively write for sensitivity calculation, which yields. In this analysis, we neglected the parasitic series resistance?

Inspection of 7 indicates the realisability of high quality integration where may be preset to a high value byand sets the realisability while tunes electronically and independently. For example, if we assume for a desired at? MHz with a typical set of values? The quadrature oscillator finds various applications in SSB modulators and spectral phase measurements: We design a VCQO using the proposed integrator in a two integrator loop, each being used single ended, one inverting and the other in noninverting mode, that is, from 3 we designed andthereafter cascading the two integrators in a loop.

With identical integrator, the oscillation frequency would be. The frequency stability factor is evaluated by at where is loop phase shift. After putting we obtained since we selected. The results are shown in Figure 2. The responses had been measured for a range of ?

MHz with suitable set of RC components wherein? It may be mentioned here that one can select any of the two default values of the multiplier constant and for the ICL multiplier device [ 7 — 91314 ] in order to enhance the tuning range concomitantly while keeping and as the limit.

We tested the frequency response of the integrator with antiphase input sinusoid signals and observed the phase error of about 5. The CMRR had been measured to be 96? It may be seen that the select-frequency was reported in the range of a maximum of ?


Datasheet «ICL8013»

KHz in the earlier circuits [ datasheef46 ]. Embedding the HA multiplier device [ 78 ] with BW ? MHzit is possible to obtain an extended frequency range. In order to examine the tuning error in we had carried out a new type of measurement using the Nyquist icl013 of the loop transfer function of the double-integrator loop in the vicinity of as shown in Figure 2 d. The deviation is then computed from datazheet intersection of the function with the real axis of the plot following the Barkhaussen criterion.

We obtained three such graphs corresponding to oscillation generation at the nominal frequencies of ? The tuning error is then derived as shown in Figure 2 e and Table 2. A new single CDBA-based differential integrator with a multiplier element in the circuit loop is presented for obtaining electronic tunability.

Subsequently, a double integrator type VCQO had been designed and tested in a frequency range of ? MHz with suitable design. Albeit other electronically tuned active realisations were reported recently in relatively lower frequency-range using Dataasheet [ 14 ], current conveyors [ 1516 ], or OTA-based allpass filter [ 17 ], such a function circuit using the CDBA had not yet been presented.

Active and Passive Electronic Datasheett. Indexed in Web of Science. Subscribe to Table of Contents Alerts. Table of Contents Alerts. Abstract A new dual-input differential input active integrator using a current differencing buffered amplifier CDBA is proposed. Analysis The proposed circuit is shown in Figure 1. Voltage tunable differential integrator using CDBA-multiplier composite block.

ICL Intersil 1MHz, Four Quadrant Analog Multiplier ChipFind Datasheet Archive |

Tuning error and THD measured at three different tuning frequencies. Intersil Datasheet, file number Semiconductor Product DatabookIntersil Corp. View at Google Scholar A.

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