BK Precision 4011A Instrucciones de operaciones descargar pdf (Pagina 40)

Laboratory 11: Problems: Operational Amplifiers and Digital Logic

201028

Laboratory #11:

Problems: Operational Amplifiers and Digital Logic

Objectives:

1. Better understanding of networks of analog and digital devices.

2. Familiarity with amplification and digital operation of some interface devices for microproc-

essors.

In Lab: Work the following problems.

1. For the following operational amplifier circuit,

a) Find V

out

in terms of R

, R

, and V

b) Given R

= 10Ω, R

= 20kΩ, and V

= 3V, what is V

out

2. Consider a calculator that does computations in 8421 BCD and presents the result as decimal

digits in the familiar seven-segment LED display shown below. The four-input, seven-output

display decoder takes a BCD word (B

) and lights the appropriate segments of the

display. Synthesize the function for one of the outputs assigned by the instructor.

Hint:

(1) For the desired output segment (a-g), make a truth table with the combinations of inputs B

, B

, and B

representing the digits 0 – 9.

(2) From the truth table, write a logical expression for the desired output segment in terms of B

, B

, and B

(3) From the logical expression, obtain a logic diagram producing the desired output form the

inputs B

, B

, and B

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 72 73

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BK Precision 4011A Instrucciones de operaciones Pagina 40