resistor caculation problem

[hycmos]

hi guys,

i have a problem of how to design a resistor network to generate the needed voltage by using as few squares as possible. is there any normal procedure to do this? or depending on the experiences of the designer?

i wish there are some reference books to me. if you have any advice i will very happy. thans very much!

 

[huojinsi]

How many current does pass the resistor? What is the voltage range u mentioned?

 

[hycmos]

How many current does pass the resistor? What is the voltage range u mentioned?

hi, the current is below 1ma, and the voltage is below 5v, and i need more outputs than one. for eample, 2V, 3V, 3.3V, and so on.

but i think the value is not important. the key is how to do this.

 

[huojinsi]

My single understanding is designing a trimming resistor network. Trimming resistor can choose out. Pls see the figure.

 

[Humungus]

Use a unit resistor so that every output voltage can be selected on the terminal of one single unit resistor. For example, choose your unit resistor si that you have 100mV acros its terminals. So, you can have 2V across 20 unit resistors, 3V with 30 resistors, etc.

 

[hycmos]

My single understanding is designing a trimming resistor network. Trimming resistor can choose out. Pls see the figure.

thanks you.

your method depends on the wegiht. and, can not get the quite arbitrary&multiply output voltages. for example, i want to get a output of 1.61V and 2.05V. in this case, your strategy is disable.

Added after 1 minutes:

Use a unit resistor so that every output voltage can be selected on the terminal of one single unit resistor. For example, choose your unit resistor si that you have 100mV acros its terminals. So, you can have 2V across 20 unit resistors, 3V with 30 resistors, etc.

many resistors!