Abstract: A shift register array is provided. The shift register array includes a plurality of shift registers connected in serial. The shift register includes a first transistor coupled between a first input terminal and a first node, a second transistor coupled between a first clock input terminal and an output terminal and a pull-up unit. The first transistor has a gate coupled to the first input terminal. The second transistor has a gate coupled to the first node. The pull-up unit includes a third transistor coupled between the first node and a ground, a capacitor coupled between the first clock input terminal and the second node and a fourth transistor coupled between the second node and the ground. The third transistor has a gate coupled to a second node. The fourth transistor has a gate coupled to the first node.

Abstract: Process for the preparation of urea from ammonia and carbon dioxide in which the composition of the various process streams is measured via an ultrasonic measuring principle and in which the results of these measurements are used for process control. The process is particularly suitable for continuous measurements in a urea process.

Abstract: A broadband, very low phase noise, temperature stable, sync loss free voltage controlled oscillator (“VCO circuit”) is described. One use of the invention would be in a radio receiver for receiving phase modulated signals from a remote transmitter. In one embodiment of the invention, the VCO circuit is disposed on a printed wiring board (“PWB”) spaced apart from the PWB on which the synthesizer circuit is disposed. The VCO circuit may comprise a resonator, a voltage controlled oscillator, a varactor, and one or more buffer amplifiers. Additionally, a positive temperature coefficient resistive heating element (“PTC”) may be included. In a preferred embodiment, the resonator, voltage controlled oscillator, varactor, and buffer amplifiers may be disposed on one side of the PWB and the PTC may be disposed on the other side of the PWB. Blind vias in the PWB enhance heat transfer from the PTC to the circuit elements on the other side of the PWB.