mohammed elzaq
New Member
i want to design current source with around 12khz and variable amplitude (1 mA - 15 mA) using ic's not transistors
thanx
thanx
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mohammed elzaq said:i want to design current source with around 12khz and variable amplitude (1 mA - 15 mA) using ic's not transistors
thanx
What's wrong with using an opamp controlling a transistor current source at only 12kHz? The combination would have a lot higher output impedance than a single transistor or two.Thunderchild said:he was only trying to convert mohamed to transistors instead of IC's and u went and spoilt it :twisted: 8) :!: :?: :idea: :arrow:
Thunderchild said:frankly i think he is at least a little bit confused else I am realy lost. why is 12 KHz necesary ? what has it got to do with a current source. if precision is not necesary he can just use a transistor with a suitable resistor on the base and measure the current with a tester and ajust until correct then just feed the base via the resistor with the 555 output. or make a precision current source like someone else will have to suggest and power it with the output of the 555 or even gate the current with another transistor.
Thunderchild said:well until he tells us what he is about we can only make conjectures