POSITIVE PEAK DETECTOR

摘要

The invention relates to a positive peak detector (1') that has been specially designed to operate at high frequencies with low power consumption, formed by a cell Gm (2'), a current mirror (3') formed by two CMOS transistors (M'6 and M'7) and a capacitor assembly (4'), in which a capacitor (C) stores the peak voltage (V'p) and is discharged progressively by means of a current source (l'4). The invention comprises the use of a high-performance cell Gm (2') formed by five CMOS transistors, four (M'1-M'4) of which are disposed symmetrically in pairs excited by a pair of current sources (l'1, I'2), while the fifth CMOS transistor (M'5) is excited by another current source (I'3).