Voltage to absolute value current converter

A converter circuit comprising:

• first and second transistors, each having a control terminal and first, second and third load terminals, said first load terminal of said first transistor coupled to said first load terminals of said second transistor for coupling to a source of supply voltage, said second load terminal of said first transistor coupled to said second load terminal of said second transistor and to the first terminal of a first resistor having first and second terminals, and said third load terminals of said first and second transistors respectively coupled to the first terminals of a second and third resistor each having first and second terminals;
• a third transistor having a control terminal and first and second load terminals, said control terminal of said third transistor coupled to said second terminals of said second and third resistors and said first load terminal of said third transistor coupled to said second terminal of said first resistor;
• a diode having anode and cathode terminals, said anode terminal coupled to said control terminal of said third transistor;
• an amplifier having positive and negative input terminals and an output terminal, said positive input terminal coupled to said first load terminal of said third transistor and said negative input terminal coupled to said control terminal of said third transistor;
• fourth and fifth transistors each having a control terminal and first and second load terminals, said first load terminal of said fourth transistor coupled to said positive input terminal of said amplifier, said control terminals of said fourth and fifth transistors coupled to said output terminal of said amplifier and said second load terminals of said fourth and fifth transistors coupled to said second load terminal of said third transistor and to said cathode terminal of said diode for coupling to a reference terminal.