Systems theory analyses systems. What, then, is a system? Perhaps the most revealing definition for this is that “a system is an entity that can be seen as a system”! This definition is based on intuitive notions; it embraces everything because all more specific definitions would be too restricting. For example, see Fig. 1 – there are two “black boxes”, the ideal mixer in 1a and the “idea mixer...

Submersible mixer is the core machinery of sewage treatment, which has a profound effect on efficiency and performance submersible mixing system treatment. This paper summarizes scientific research results in recent years from four aspects: structure energy characteristics mixer, numerical simulation calculation method, flow field characteristics, factors affecting characteristics. The existing...

BACKGROUND: It has been proven by science and practice that feeding animals with complete feed mixtures can increase the productivity of feed. The preparation loose become most widespread. analytical review scientific research works in field machinery technology for showed advantage using batch mixers. This is related to fact due circulation components a mixer, high quality achieved. At same ti...

this paper presents a design of an uwb downconversion integrated cmos resistive ring mixer with linear voltage regulator (lvr), to supply required biasing voltages for the mixer section. the designed mixer circuit has been optimized for using in heart rate extraction system with microwave doppler radar at 2.4ghz frequency. this mixer needs 2 dc bias voltages equal to 0.5 and 1 volts for its bes...

Radio astronomy requires SIS mixers and receivers with very high stability. The goal for the total power stability of the ALMA receivers is 1x10 over 1 second. The SIS mixer is one of the most critical components in the receiver signal chain determining stability. Most changes in mixer noise and gain are due to variations of its operating conditions. In this paper we present accurate measuremen...

Frequency translation which converts the original signal to a much lower baseband frequency signal is a vital role in the RF receiver design. In this work, a high linear down-conversion Gilbert cell mixer at 100MHz is designed using TSMC 0.18μm RF CMOS process. Linearity is an important performance measure in RF circuits particularly in mixer design. In this paper, the two types of linearizatio...

9 The effect of mixer shear strain rate on the performance of a model 10 micro-crystalline cellulose pharmaceutical paste undergoing extru11 sion–spheronisation was studied using a laboratory scale planetary 12 mixer and a screw-based mixer. The maximum shear strain rate in 13 each mixer was estimated. Five pastes were prepared, one each at 14 97 and 265 s−1 in the planetary mixer, and one each...

This paper presents a low voltage wideband downconversion mixer using current-mode approach for multi-standard receivers. The proposed mixer uses a current mirror amplifier with an embedded passive switching core to achieve mixing function, which can combine the advantages of active and passive mixers simultaneously. The mixer is implemented using a 0.18μm CMOS technology and covers frequency b...