Title :
AM Suppression with Small AM-PM Conversion by Means of Variable Gain
Author :
Klumperink, Eric A M ; Klein, Carlo T. ; Rüggeberg, Bas ; Tuijl, Ed M.v.
Author_Institution :
MESA Research Institute, University of Twente, Dept. of Electrical Engineering, P.O. Box 217, 7500 AE, Enschede, The Netherlands. Tel.: X-31-53-892736; Fax: X-31-53-341903, e-mail: e.a.m.klumperink@el.utwente.nl
Abstract :
This paper proposes the use of a variable gain amplifier instead of a hard limiter for AM suppression with a low AM-PM conversion. Measurements and simulations indicate that the AM-PM conversion can be kept below 0.5° at 40MHz over a gain range of 20 dB in a 2.5¿ BICMOS process, where typical hard limiters exhibit 3-5°. This is achieved at 80MHz bandwidth, while a hard limiter would need more than 600MHz bandwidth to obtain similar results.
Keywords :
Bandwidth; Broadcasting; Capacitance; Circuit topology; Clocks; Delay; Gain measurement; Optical amplifiers; Transfer functions; Voltage;
Conference_Titel :
Solid-State Circuits Conference, 1995. ESSCIRC '95. Twenty-first European
Conference_Location :
Lille, France
Print_ISBN :
2-86332-180-3
