A remote motor speed sensor provides a current signal in the range of -2.5 to 2.5 mA. Design a circuit to
convert this signal into a voltage signal in the range from 2 to 3 V. After the conversion, a low pass filter is
used to suppress any noise AC signals with frequency higher than 50 Hz.
An 8-bit analogue-to-digital converter will be given and should be used to convert the output of the above
analogue circuit into an 8-bit digital signal. The 8-bit signal should go through two 4-to-7 decoders so that
the value of the 8-bit digital signal is displayed as two hexadecimal values on two seven-segment display
devices to indicate the safe running speed of the motor in range 0-255 (i.e. 00hex to FFhex).
Part 1: Design a current amplification and filtering circuit [40 marks]
Use an AC current source with a very low frequency of 0.01 Hz to emulate the slowly changed current
output signal from the remote motor speed sensor. Design the current amplification circuit using
appropriate op-amp circuits so that you can achieve the required output voltage (2 to 3 V). Demonstrate
the gain, Bandwidth, Rin of your op-amp circuits by both calculation and simulation.
Design the low-pass filter. Demonstrate the bandwidth of the filter by both calculation and simulation.
Combine the op-amp circuit and the filter. Demonstrate the gain, Bandwidth, phase shift, Rin of your
combined circuit by both calculation and simulation.
a) Current sampling/amplification circuit: [15 marks]
b) Low-pass filter circuit: [15 marks]
c) Combined circuit: [10 marks]
Liverpool John Moores University Coursework 4304ELE Digital and Analogue Electronics
W. Zhang / O. Dordevic 2017/2018 Page 4 of 9
Part 2: Design an 8-bit counter and a 4-to-7 decoder for the Seven-Segment display [40 marks]
The output voltage signal from the analogue circuit should then be converted into an 8-bit digital signal,
which represents the levels of the motor speed. You can choose the generic 8-bit ADC device from the
Proteus library => Modelling Primitives => ADC_8 for this task. Following is an example connection of the
ADC convertor that you can refer to when you design your circuit.
2.1) 8-bit counter design
Design an 8-bit synchronous counter by using D-type flip-flops. The counter should be driven by a CLK signal
running at 256k Hz. You should show how the counter is designed, and simulate the circuit.
Marks allocation: [15 marks]
The MSB output of the counter should be used to connect to the clock terminal of ADC_8 converter. The
value of the output of the ADC_8 converter should be displayed in two 7-segment display units. The MSB
four bits are displayed in one and the LSB four bits in another 7-segment display. In order to achieve this,
you should design the 4-to-7 decoder for the 7-segment display, as detailed below.
2.2) 4-to-7 decoder design
Reason: The purpose behind this investigation is to test the effect of Perceived Organizational Support on Job satisfaction and to choose the effect of mediation of Trust on Job Satisfaction in the two unmistakable sections of work Public and Private. Here Sector of Employment goes about as a mediator and Job Trust as the go between. Plan/technique/approach: A survey was orchestrated and managed to 182 delegates working in individuals when all is said in done and the private section in different endeavors like Banking, Mining, Power Generation and Information Technology. Disclosures: The investigation has developed positive associations between the three creates of clear progressive help, work satisfaction and occupation trust for the general model and open fragment delegates, however these relations are not basic in case of private region laborers. The mediation effect of Trust is basic at 10% for the general model sans freely in the private and open division. Research limitations/recommendations: The respondents have varied profiles with respect to age/years of experience, rank level and the organizations that they work in. These results may not be generalizable to all specialists in various relationship in different organizations and geographic zones. Similarly, an extensive level of responses have been assembled through the web which isn't an inside and out exact and strong kind of data amassing. Practical consequences: The investigation revelations are depended upon to help the present relationship in individuals when all is said in done and private territory to comprehend purposes behind reducing occupation satisfaction of the laborers and devise ways to deal with upgrade the perspective of legitimate help. Imagination/regard: This paper considers the refinement in the associations showed between Perceived various leveled enable, work to trust and occupation satisfaction in the private and open region in the Indian setting. This is one of the essential undertakings towards focus the business parts on a comparable preface. Catchphrases: Seen Organizational Support, Job Trust, Job Satisfaction, Public Sector, Private Sector Introduction: Business Satisfaction is a measure of how content an individual is with his movement. Numerous models have been made remembering the ultimate objective to clear up conditions and final products of occupation satisfaction, for example, impact theory, dispositional speculation, two factor speculation and the movement characteristics appear. For an impressive period of time masters have been endeavoring to develop relationship among various parameters impacting the movement satisfaction, work obligation, work commitment and occupation execution of the agents in the affiliations. This is particularly essential for relationship with a particular ultimate objective to improve working conditions, understand the stirring segments and in like manner increase delegate gainfulness by making a sound work environment. Occupation Satisfaction is a marker of specialist perceptions and feelings about their businesses. It can in like manner expect work rehearses like legitimate citizenship,absenteeismandturnover.Another basic and appropriate research finding is the association between life satisfaction and occupation satisfaction which is seen to compare. It infers that a man who is content with his movement may be extremely content with his life and the a different way. Occupation satisfaction is acknowledged to quite impact the benefit of the laborer which is vital to strength units that are importance to extend yields. Seen various leveled encourage is commonly thought to be a dynamic association between the business and his laborers. According to Rhoades and Eisenberger(2002) the accomplices share a comparing relationship where higher POS is associated with sincere undertakings put in by the laborer to achieve various leveled targets. Research disclosures prescribe that master delegates will most likely observe higher definitive help when they determinedly identified with their workplace and a positive relationship was seen between work execution and POS (Heckman et al., 2009). Our investigation goes for analyzing the association between observed various leveled help and occupation satisfaction. Place stock in goes about as a go between in our model. Seen definitive help is how much delegates assume that their affiliation regards their duties and contemplates their success. Trust is to believe the person who you trust to do what you expect and work satisfaction depicts how content an individual is with his or her movement. This investigation tries to consider and develop associations between the creates for individuals as a rule and private division specialists in India. There are distinctive standard scales available to measure each one of these parameters. In this examination we have generally used the shortened version of the scales. Research establishment and Hypothesis Seen Organizational Support: The possibility of various leveled help has sufficiently made eagerness for demand to mull over its impact on execution of the specialists. The wisdom an agent makes about his/her affiliation regarding his responsibilities and considering his interests and success is named as Perceived Organizational Support (POS)(Eisenberger and Rhoades,2002). A meta-examination has demonstrated that three critical characterizations of wants that an agent has from his work affiliation are connected with POS. They are reasonableness of frameworks, support of the incite unrivaled and execution related prizes and awesome work conditions. Thinking about the organizations' wants from their delegates, they regard responsibility and trustworthiness. Feeling driven point of view of various leveled obligation underlines that the sentiment solidarity felt by the delegate and the characteristics that he bestows to the affiliation choose the execution and non-appearance levels, probability of leaving his place of business (Mathieu and Zajac, 1990;Meyer and Allen, 1997; Mowday, Porter, and Steers, 1982). Social Exchange researchers express that work is a give and take relationship of duty and unwavering quality for generous prizes and social focal points (e.g., Bateman and Organ, 1983; Brief and Motowidlo, 1986). The antecedents of POS and its outcomes are cleared up by the various leveled help theory which (Eisenberger, Huntington, Hutchison, and Sowa, 1986). This speculation acknowledge that to choose affiliation's accessibility to remunerate delegate attempts and meet their socio energetic prerequisites, specialist shapes general feelings about the stress showed up and expected in future by his relationship towards him. POS is moreover seen as an assertion of the assistance that will be available to the delegate amidst torment (cf. George, Reed, Ballard, Colin, and Fielding, 1993). Moves made by the administrators of the affiliation are illustrative of its objective and are not singular points of view. The embodiment of the affiliation is maintained by its great and legal obligations, culture, gauges and methodologies. Agents outline perceptions in light of the above pointers about the assistance they get from their work affiliation (Levinson, 1965). This speculation also communicates that POS should develop a type of a dedication in the agent to perform for the affiliation and help accomplish its goals. The part astuteness of agents is acknowledged to depend upon the activities that the affiliation sees as critical for compelling work execution (Porter and Lawler, 1968). Execution is required to increase with higher undertakings put in by the specialist and the perception that such profitable undertakings will be adjusted (Campbell, Dunnette, Lawler, and Weick, 1970; Katz, 1964). Occupation Trust Trust is a champion among the most basic fundamentals on which a business laborer relationship is based. This relationship goes far in conferring conviction and destructing fear by influencing a working environment to free of pressure and uncertainty (Zeffane et.al, 2003). Trust has in like manner been proposed to be a psychological state as showed by which it is assessed in light of seen lack of protection or danger as a result of the powerlessness included (Kramer, 1999). In our examination work we are stressed over the trust inside the affiliation i.e. the level of trust the agents have in the affiliation they work for, basically among specialists and boss or chiefs. In this way in a definitive setting trust relies upon the social exchange speculation fundamentally (Whitener et al., 1998), which uncovers trust to be an aftereffect of exchange of points of interest between the two get-togethers included. The essential thought required here is "correspondence", which develops the way that enthusiasm for the agents in a relationship to the extent affirmation, reinforcing, value, support and diverse favors will constantly be returned and not go misuse (Gouldner, 1960). Agreeing the investigation done by Prusak and Cohen (2001), it is doable for chiefs to develop a circumstance of trust in the relationship by enabling shared trust, and support. This along these lines constructs the level of evident trust in the relationship by the agents. It has in like manner been battled this trust in (McAllister, 1995) is the best approach to various leveled trust and control. It prompts extended level of agent bolster which incorporates fundamental authority control in the hands of the subordinates which would unavoidably provoke augment in messes up. Thusly, by doling out this vitality to the subordinates the affiliation grows the peril factor however meanwhile, since this assignment needs a commitment of trust in (Yukl, 1994), gives an unmistakable sign that affiliation has confidence in its laborers and in this way the individual sees this definitive trust and along these lines contributes feasibly and unequivocally tow>GET ANSWER