I want to check this circuit for proper interfacing, I am interfacing a 3.3V output to CMOS CD4071 with supply voltage of 12V.
-First I used a low threshold voltage NMOS TN0106 as shown in the circuit. I put a drain resistance of 10kohm to limit the current to 1.2mA when the output is low. will this output impedance degrade the circuit performance(capacitive coupling noise for example ) to the CD4071 gate? Is their a better way to switch the 12 v using the 3.3V input?
-The second part is the control of the 12v relay 400ohm coil resistance using a PMOS VP0106,The 1K resistor is to protect against inductive spikes coupled back from the load. Do I need to consider anything for proper operation. Thanks