Labels:text | black and white | handwriting | parallel | font | number | printing | ink | paper | document OCR: APPLICATIONS INFORMATION Design Example: FSK DECODING: 75 Baud FSK demodulator with mark/space frequencies of Figure 9 shows the basic circuit connection for FSK decoding. 1110/1170 Hz: With reference to Figures 2 and 9, the functions of external components are defined as follows: Ro and Co set the PLL Step 1: Calculate fo: fo =(1110+1170) (1/2) =1140 Hz center frequency, R1 sets the system bandwidth, and C1 sets Step 2: Choose Ro = 20 KS2 (18 KS fixed resistor in series the loop filter time constant and the loop damping factor. with 5 KS2 potentiometer) CF and RF form a one-pole post-detection filter for the FSK Step 3: Calculate Co from Fig. 6: Co = 0.044 AF data output. The resistor RB (= 510 KS2) from Pin 7 to Pin 8 Step 4: Calculate R 1: R1 = Ro (2240/60) = 380 KS2 introduces positive ...
