1 (398)

Prévia do material em texto

Step of 9 8.06DP The maximum frequency of the external feedback is the reciprocal of the minimum clock period. Write the formula for minimum clock period when the device operating with external feedback Here, co is the propagation delay of the first PLD is the setup time of the second Step 9 Therefore clock period (co of first PLD of second PLD) Step For GAL GAL 20V8B with suffix 7 Calculate the minimum clock period of the circuit, when the devices GAL 16V8D and L20V8B are connected in external feedback =5 ns+7 ns ns Calculate the maximum frequency with the feedback = =83.33 MHz Thus, the maximum frequency with the external feedback 83.33 MHz Step 4 of 9 For GAL GAL 20V8B with suffix -10 Calculate the minimum clock period of the when the devices GAL 16V8D and 20V8B are connected in external feedback ns ns Calculate the maximum frequency with the external feedback 1 =58.82 MHz Thus, the maximum frequency with the external feedback 58.82 MHz Step 5 of 9 For GAL GAL 20V8B with suffix Calculate the minimum clock period of the when the devices GAL 16V8D and 20V8B are connected in external feedback = ns ns Calculate the maximum frequency with the external feedback 1 - 45.45 MHz Thus, the maximum frequency with the external feedback Step 6 of 9 For GAL GAL 20V8B with suffix Calculate the minimum clock period of the circuit, when the devices GAL 16V8D and 20V8B are connected in external feedback ns ns Calculate the maximum frequency with the external feedback 1 = =58.82 MHz Thus, the maximum frequency with the external feedback 37.04 MHz GAL22V10D with Calculate the minimum clock period of the circuit =9 ns Calculate the maximum frequency with the external feedback Thus, the maximum frequency with the external feedback Step 7 of 9 Calculate the minimum clock period of the circuit ns ns Calculate the maximum frequency with the external feedback = =71.43 MHz Thus, the maximum frequency with the external feedback 71.43 MHz Step Calculate the minimum clock period the circuit ns - ns Calculate the maximum frequency with the external = =55.55 MHz Thus, the maximum frequency with the external feedback Step 9 of 9 Calculate the minimum clock period of the circuit = ns Calculate the maximum frequency with the external feedback = 30x10 33.33 MHz Thus, the maximum frequency with the feedback