current amplifier 20mA to 0-120mA

[balaji selva]

can u suggest a current amplifier circuit to convert 20mA to 0-120mA...the i/p voltage is 10 V... i require this circuit for amplifying square wave...
please reply soon friends

 

[jiripolivka]

What you need is no current amplifier but a power amplifier. You do not specify if your need to amplify the input from zero to 10 V. If so, you need to use an operational amplifier with a power buffer that can supply 120 mA into an UNSPECIFIED load.

Before you can get an advice, you must exactly specify your load and an available power supply.

 

[balaji selva]

my friend the load is 1K....there's no importance for voltage for my circuit...only current is essential

 

[hamid159]

you can also use common emitter amplifier