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OTA Based Mem-capacitor Validation and Implementation Using Commercially Available IC

Shankar Chandra, Nagar Anuj, Singh Ashutosh, Kumar Ankleshwar

International Journal of Electronics and Telecommunications

2023

Vol. 69, No. 3

587--592

This paper discusses a mem-capacitor circuit which is based on two MO-OTA along with a multiplier and 4 passive elements. This circuit is a charge-controlled memcapacitor emulator which is independent of any memristor also it consists the feature of electronic tunability. Additionally, this circuit is simpler and uses less hardware because it lacks a mutator and uses fewer active-passive components. The circuit behaviour is justified through various simulations in cadence Orcad tool with 180nm CMOS TSMC parameters. Additionally, conclusions from simulations and theory are validated experimentally through commercially available IC.

High repetition rate, tunable, Q-switched diode pumped Tm:YLF laser

Gorajek Ł., Jabczyński J. K., Żendzian W., Kwiatkowski J., Jelinkova H., Sulc J., Nemec M.

Opto-Electronics Review

2009

Vol. 17, No. 4

309-317

The aim of work was to characterize a simple oscillator consisted of Tm:YLF crystal end-pumped by a fiber coupled diode laser and active Q-switch with tunability option. About 7 W with near 35% slope efficiency was demonstrated in a free-running mode. The divergence angle was about 4.3 mrad and estimated parameter M² < 1.3. Continuous tuning by means of Lyot's filter, consisted of 2 quartz plates in the range of 1879.0-1939.4 nm with less than 1-nm linewidth, was achieved. For the best case (10-ms pump pulse duration, 42-A pump current corresponding to 266 mJ of pump energy) , the Q-switched energy was 10.5 mJ with pulse duration of 22 ns corresponding to near 0.5 MW peak power. The 2.5 W of average power with 12.6-kW peak power and 2000-Hz repetition rate was demonstrated for cw pumping regime.