DocumentCode :
3284050
Title :
A temperature compensated 100 MHz to 1 GHz variable gain amplifier in a 8 GHz 1.2 μm BiCMOS process
Author :
Häkkinen, Juha ; Rahkonen, Timo ; Kostamovaara, Juha
Author_Institution :
Dept. of Electr. Eng., Oulu Univ., Finland
Volume :
1
fYear :
1996
fDate :
12-15 May 1996
Firstpage :
183
Abstract :
A variable gain amplifier with linear gain control has been implemented in a commercially available 8 GHz 1.2 μm BiCMOS process. The gain adjustment linearization is based on forcing a linearly controllable current through diode-connected transistors, thus generating an internal logarithmic control voltage for a Gilbert-type variable gain cell. A cascode type gain stage is used to provide most of the available gain. PTAT and bandgap type references are used to stabilize the gain against changes in operating conditions. Thus, the maximum simulated differential gain of 18 dB varies less than 1 dB over temperature range from -10°C to 85°C. The circuit has a simulated bandwidth of over 1 GHz and 2 dBm output -1 dB compression power with expected gain adjustment range of 50 dB. The chip area is 1.15×2.00 mm and it consumes 100 mA from a 5 V supply
Keywords :
BiCMOS analogue integrated circuits; UHF amplifiers; compensation; gain control; -10 to 85 C; 1 GHz; 1.2 micron; 100 MHz to 1 GHz; 100 mA; 18 dB; 5 V; 8 GHz; BiCMOS process; Gilbert-type cell; PTAT reference; bandgap type reference; bandwidth; cascode type gain; differential gain; diode-connected transistor; gain adjustment linearization; linear gain control; logarithmic control voltage; output compression power; temperature compensation; variable gain amplifier; Bandwidth; BiCMOS integrated circuits; Capacitors; Circuit simulation; Frequency; Gain control; Parasitic capacitance; Power amplifiers; Temperature; Voltage control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 1996. ISCAS '96., Connecting the World., 1996 IEEE International Symposium on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3073-0
Type :
conf
DOI :
10.1109/ISCAS.1996.539839
Filename :
539839
Link To Document :
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