Sinusoidal Oscillators and Waveform Generators using Modern Electronic Circuit Building Blocks by Raj Senani D. R. Bhaskar V. K. Singh & R. K. Sharma

Author:Raj Senani, D. R. Bhaskar, V. K. Singh & R. K. Sharma
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

(6.99)

A number of authors have employed DBTA and VDTA to synthesize oscillators; for instance, see [203, 204, 340–344]; an interesting VM QO was presented by Herencsar-Koton-Vrba-Lahiri [203] which is shown in Fig. 6.77.

Fig. 6.77DBTA-based VM QO proposed by Herencsar-Koton-Vrba-Lahiri [203]

6.4.11 Oscillators Using Current-Mode Op-Amps

Although the ubiquitous voltage -mode op-amp (VOA ) is universally recognized as the workhorse of analog circuit design since ages and hundreds of variations of VOAs are manufactured as integrated circuits worldwide, its dual the so-called current operational amplifier (COA) has although attracted attention of researchers, to the best knowledge of the authors, no IC COA exists so far.

A COA-based QO based upon the use of a first order APF and an inverting amplifier was proposed by Kilinc and Cam in [338]. Their circuit is shown in Fig. 6.78.

Fig. 6.78COA-based QO proposed by Kilinc and Cam in [338]

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