Title :
A Novel Offset-Compensated Low-Level Envelope Detector
Author :
Straver, Wil G.M. ; Nordholt, Ernst H.
Author_Institution :
Delft University of Technology, Dept. of Electrical Engineering, Mekelweg 4, 2628 CD DELFT, The Netherlands
Abstract :
An integrated envelope detector for the linear and accurate detection of amplitude modulated signals at levels as low as 3 mV and frequencies up to 15 MHz is presented. The DC input offset voltage is automatically compensated by using a novel technique. The circuit employs full-wave detection in an accurate biased diode bridge. At an 80% modulation depth, the distortion in the demodulated signal is well below 1%.
Keywords :
Bridge circuits; Chirp modulation; Diodes; Distortion; Envelope detectors; Feedback circuits; Frequency; Linearity; Parasitic capacitance; Voltage;
Conference_Titel :
Solid-state Circuits Conference, 1987. ESSCIRC '87. 13th European
