Title :
Measurements and analysis of the optimisation of HBT circuits for optical demodulator designs
Author :
Langlois, P.J. ; Rezazadeh, A.A.
Author_Institution :
Dept. of Electron. Eng., King´´s Coll., London, UK
Abstract :
The second order non-linearity when using the base-emitter diode or the base-collector diode in an HBT for down conversion is analysed and measured. The non-linearity in the b-e circuit is shown to be at least β times larger than the b-c diode circuit (>90 times in the measured example). The contribution of the non-linearity of the current gain is identified. A circuit with added diodes is also examined
Keywords :
bipolar transistor circuits; circuit optimisation; demodulators; heterojunction bipolar transistors; optical frequency conversion; phototransistors; HBT circuit; base-collector diode; base-emitter diode; current gain; design optimisation; frequency down-conversion; nonlinearity; optical demodulator; Demodulation; Design optimization; Diodes; Equivalent circuits; Heterojunction bipolar transistors; Linearity; Nonlinear equations; Nonlinear optics; Optical design; Voltage;
Conference_Titel :
High Performance Electron Devices for Microwave and Optoelectronic Applications, 2000 8th IEEE International Symposium on
Conference_Location :
Glasgow
Print_ISBN :
0-7803-6550-X
DOI :
10.1109/EDMO.2000.919067
