Prospectus, April 11, 1972

ACCREDITATION!: PARKLAND RECEIVES NORTH-CENTRAL APPROVAL; Deadlines set for allied Health Applications; Miss Whipple Soon to be Teacher Aide; Agricultural Mechanics Contest at Parkland; Watchmaker Assoc. Establishes Loan Fund; Parkland Sponsors Multi-Media Course; Community band and choir open; The Editor\u27s View: Quality Education Is Here At Parkland College, Speaking Out On Stereotypes; Letters to the Editor: A Rip-off?; Spring Quarter PCSG Election Information: Hours and the requirements, openings and responsibilities; Meet Your Candidates: For Vice President, For Treasurer, For Senator-Convocations, For Senator-Organizations, Senator-Student Svs.; Parkland\u27s Preparedness Program: A step towards success in higher education; The Program: An Introduction; Disadvantaged-Marginal Student is Focus of Conference-Workshop at Parkland; President presents certificates of completion to successful Preparedness Students; What\u27s Going On; Counselor\u27s Corner: Evening Counseling, Vocational Information, Sangamon State Representative; Parkland Notices: Nurse Refresher, Population Course Offered; Health Ed. Week, Public Aids, Women Scholars, Summer Information, Telephone Service; \u27Hospital\u27 Pokes Fun At Society; Ear Wax; Orpheus Reborn: Death At Sea, des sourires enfantin..., yet even so they all (hear)...; National Wildlife Week A Success; A Short History Of Parkland; National Collegiate News; Athletic Department Praisedhttps://spark.parkland.edu/prospectus_1972/1008/thumbnail.jp

An improved bang-bang PLL employing a quaternary phase detector

This paper presents a bang-bang PLL architecture that employs two discrete loop gains depending on whether the magnitude of the PLL's phase error is less than or greater than a/2. The advantage of this architecture is that the two loop gains can be used to independently optimize both pull-in range and jitter characteristics. A conservative expression to calculate pull-in range is derived and it is shown that pull-in range depends mainly on the PLL's outer loop gain, thus freeing inner loop gain to control PLL dynamics when in lock

Using wireless sensors as selection devices for a multimedia guidebook scenario

This paper describes the implementation of a wireless sensor network for a multimedia guidebook scenario incorporating a pointer-sensor system for the selection of locality-aware information. An Information Point Station Network (IPSN) was developed and consists of several Information Point Stations (IPSs) placed at locations of significance, with access to information items on a centralized server. In the multimedia guidebook scenario, a user selects a particular information item to view, either by way of a menu system appearing on their mobile computing device (MCD) or a more intuitive pointer-sensor system as described in this paper. Laser sensors are placed next to prominent or relevant objects, and can be either directly connected to an IPS, or function as isolated sensor nodes. The pointer is attached to the MCD by way of a serial port and the user points the pointer at the laser sensor next to the object for which they require information. The information is then sent to the MCD via Bluetooth. The implementation was found to be successful and was tested with multiple users accessing information items from a given IPS as well as multiple IPSs attached to the centralized server. Still, there is further work to be done on the isolated sensor nodes

A bang-bang PLL employing dynamic gain control for low jitter and fast lock times

Bang-bang phase detector based PLLs are simple to design, suffer no systematic phase error, and can run at the highest speed a process can make a working flip-flop. For these reasons designers are employing them in the design of very high speed Clock Data Recovery (CDR) architectures. The major drawback of this class of PLL is the inherent jitter due to quantized phase and frequency corrections. Reducing loop gain can proportionally improve jitter performance, but also reduces locking time and pull-in range. This paper presents a novel PLL design that dynamically scales its gain in order to achieve fast lock times while improving fitter performance in lock. Under certain circumstances the design also demonstrates improved capture range. This paper also analyses the behaviour of a bang-bang type PLL when far from lock, and demonstrates that the pull-in range is proportional to the square root of the PLL loop gain