Recent content by Hubert Tchio

@Baluncore Thank you so much. The circuit is perfectly what I wish to have. I will then proceed to design the PCB. sharing a grass of beer would have been a nice idea. Once more thank you. Best wishes Hubert

@Baluncore, thank you so much. I will look at it. Have a great weekend Best regards Hubert

@Baluncore Thank you so much, I must admit it has not been an easy affair. Please I still count on you to complete this task. I have simulated your design but the LED current still stay high "closed to 4A" the reason why is not working. Please can you help? I have tried many values for the...

sorry know=now

Thank you. I am glad i got some nice values. I know understand the theory behind it. I must admit i have learned something. for the integrator op amp: OPA234 has a bias current of 25nA LM6132 has a bias current close to 100nA for a fast comparator: LMH6622 has a speed of 50MHz, i am targeting...

ok, now is done for the transistor areas of 12 and 16 A) Sensor, Rset = 227.73 ohms and Iset = @25°C, 298.21uA; @95°C, 368.15uA; @ 105°C, 378.17°C B)Tempco R1= 380.29 ohms and R2 = 3313.86 ohms imply Iset: @25°C, 368.33uA; @95°C, 368.15uA; @105°C = 368.06uA

@Baluncore here are today's result for the transistor areas of 10.36 and 11 A) Temp sensor Rset= 226.03 @25°c, Iset= 298.15uA; @95°c, Iset=368.15uA, @105°c, Iset= 378.16uA B) R1= 381.9 ohms and R2 = 3329.3 ohms @25°c, Iset=370.08uA, @95°c, Iset= 368.15uA @10°C, Iset = 367.71uA These values...

@Baluncore, here is an update for the Tempco current source for same model Vsupply(V) R1 R2 Iset (uA) temp (degree) 2,50380 3.35k 0 0 2,5 380 3.35k 369.843 25 2,5 380 3.35k 368.361 95 2,5 380 3.35k 368.164 100 will be grateful to hear from you.

@Baluncore may be i got it this time around temperature sensor some modification Q6 R N001 v+ 0 pnp1 10.36 Q1 N003 N003 R 0 npn1 11 results Vsupply(V) Rset(ohm) Iset (uA) temp (degree) 2.50 226 0 0 2,5 226 298.168...

@Baluncore I tried to change the model as you required * Pin order: v+ v- R .SUBCKT LM334 v+ v- R Q4 N002 N001 v+ 0 pnp1 Q5 N003 N001 v+ 0 pnp1 Q6 R N001 v+ 0 pnp1 16 Q1 N003 N003 R 0 npn1 12 Q2 N002 N003 N004 0 npn1 Q3 N001 N002 R 0 npn1 C1 N002 N004 50p R2 N004 v- 1 R8 v+ v- 1G C2 v+ v-...

@Baluncore sorry about that, here are the correct results here are my results: A)Temperature sensor Vsupply(V) Rset(ohm) Iset (uA) temp (degree) 2,50 226 0 0 2,5 226 321,438 25 2,5 226 396,95 95 B)...

@Baluncore here are my results: A)Temperature sensor Vsupply(V) Rset(ohm) Iset (uA) temp (degree) 2,50 226 0 0 2,5 226 321,438 25 2,5 226...

@Baluncore, ok thank you. I will look at it and get back to you. Thank you for the help so far. here is the INA210.sub model * Begin INA210 ***************************************************************************** .SUBCKT INA210 IN+ IN- V+ GND OUT REF XDP6 GND IN- D_Z26V XDP5...

@Baluncore *Selfmade model of the LM334 from National Semiconductor or ST * Helmut Sennewald * * Pin order: v+ v- R .SUBCKT LM334 v+ v- R Q4 N002 N001 v+ 0 pnp1 Q5 N003 N001 v+ 0 pnp1 Q6 R N001 v+ 0 pnp1 14 Q1 N003 N003 R 0 npn1 14 Q2 N002 N003 N004 0 npn1 Q3 N001 N002 R 0 npn1 C1 N002 N004...

@Baluncore Hope you had a nice weekend, just wish to know if you were able to complete the model as desirer.