Patent ID: 6278299
Filing Date: 2001-08-21
Classification: H03F

Abstract:
A voltage to current converter comprising:a) a first long tail pair comprising first and second active devices of a first conduction type and a first tail current source,i) said first active device having an output terminal forming a first output of said converter, a control terminal forming a first input of said converter, and a common terminal,ii) said second active device having an output terminal forming a second output of said converter, a control terminal forming a second input of said converter, and a common terminal;b) a second long tail pair comprising third and fourth active devices of a second conduction type opposite said first conduction type and a second tail current source,i) said third active device having a control terminal connected to said control terminal of said first active device and an output terminal connected to said common terminal of said second active device,ii) said fourth active device having a control terminal connected to said control terminal of said second active device and an output terminal connected to said common terminal of said first active device; andc) said common terminals of said first and second active devices being connected via first and second resistors, respectively, of substantially equal first value to said first tail current source.