Karthik rajagopal
- May 9, 2016
- 257
- Joined
- May 9, 2016
- Messages
- 257
Hi all,
I started working with flip flop where I encountered a problem of the flip flops entering a random state on power up. So, I built a power on reset circuit with a 10uF and a 1k resistor. My circuit contains two different sections where on part has JK flip flops with negative reset trigger and D flip flops with positive reset trigger. So I connected my power on reset circuit to D flip flops directly and to JK flip flops through an inverter. Since the reset lasts for 10ms, the inverter's (NOT gate) propagation delay creates an output mismatch between the two sections of the circuit. I also tried using an NPN transistor in place of a NOT gate which didn't improve the situation. Please suggest me a way to solve this problem.
Thanks in advance.
I started working with flip flop where I encountered a problem of the flip flops entering a random state on power up. So, I built a power on reset circuit with a 10uF and a 1k resistor. My circuit contains two different sections where on part has JK flip flops with negative reset trigger and D flip flops with positive reset trigger. So I connected my power on reset circuit to D flip flops directly and to JK flip flops through an inverter. Since the reset lasts for 10ms, the inverter's (NOT gate) propagation delay creates an output mismatch between the two sections of the circuit. I also tried using an NPN transistor in place of a NOT gate which didn't improve the situation. Please suggest me a way to solve this problem.
Thanks in advance.