Bit Rate, Baud Rate Important Questions
Question 1: 500 bits of data are transmitted via a UART in 100 ms. The UART configuration includes 1 start bit, 8 data bits, and 2 stop bits. What is the required minimum baud rate? (a) 55000 baud (b) 50000 baud (c) 5500 baud (d) 5000 baud Answer: (a) 55000 baud Solution: First, calculate the bit rate ( R b cap R sub b 𝑅 𝑏 ). The time to transmit 500 bits is 100 ms = 0.1 s 100 ms equals 0.1 s 1 0 0 m s = 0 . 1 s . R b = 500 bits 0.1 s = 5000 bps cap R sub b equals the fraction with numerator 500 bits and denominator 0.1 s end-fraction equals 5000 bps 𝑅 𝑏 = 5 0 0 b i t s 0 . 1 s = 5 0 0 0 b p s Next, determine the total number of bits per character frame. Total bits = 1 (start) + 8 (data) + 2 (stop) = 11 bits The baud rate is the total number of bits per second. Baud Rate = R b × ( total bits per frame ) cap R sub b cross open paren total bits per frame close paren 𝑅 𝑏 × ( t o t a l b i t s p e r f r a m e ) Baud Rate = 5000 bps × 11 = 55000...