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	Miniature stereoamplifier Dokulil, Zdeněk ; Mišurec, Jiří (referee) ; Káňa, Ladislav (advisor) The aim of this thesis was to design and construct a mains powered stereo power amplifier with minimal overall dimensions, equipped with a mute and tone/volume control circuit. The usage of an integrated power amplifier circuit was required. The circuit solution is based on a DC controlled integrated tone and volume control circuit LM1036, power amplifier TDA7262 and a number of supporting circuits for mute switching and temperature protection. An assembled sample of amplifier has 2 x 20 watts of output power, SNR 83,7 dB and a flat frequency response within the range of 3 dB for inputs from 16 to 20 000 Hz. Detailed record
	Design of bass guitar preamplifier Müller, Radek ; Tošovský, Petr (referee) ; Brančík, Lubomír (advisor) This thesis deals with analog bass guitar preamplifiers and related functional blocks such as equalizers and bass effects. The first part contains a theoretical analysis of individual functional blocks preamplifiers and principles as well as an outline of the design and construction principles. In the following section is presented a design of connection that involves a bass guitar preamplifier, including an equalizer, an integrated distortion effect and an amplifier for headphone output. The proposed connections are simulated in the PSpice program and the printed circuit boards design is carried out using the Eagle program. Based on previous results, the construction of a bass guitar preamplifier is realized. The parameters of the individual blocks are measured and compared with the simulations. Detailed record
	Effect of P Enrichment on Rhizodeposit Quantity and Bioavailability: a Comparison of Two Macrophyte Species KUBEŠOVÁ, Jaroslava A review on plant rhizodeposition, nutrient uptake and interactions with rhizosphere microbial community is presented. Based on reviewed findings, a study on rhizodeposition rates and rhizodeposits bioavailability of two macrophyte species with different life strategies (stress-tolerator and competitor) was conducted. The effects of P addition and sediment type on rhizodeposition and microbial activity were examined. Research was carried out in tropical marshes of Belize; results from field were supported by C partitioning mesocosm study. This project was supported by NSF # 0089211 and ME 912. Detailed record

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