Title :
A low-distortion transconductance amplifier
Author :
Mathew, M. ; Hayatleh, K. ; Hart, B.L. ; Lidgey, F.J.
Author_Institution :
Sch. of Technol., Oxford Brookes Univ., Oxford
Abstract :
This paper describes a highly linear and low- distortion, bipolar differential voltage-to-current converter (V-I) circuit that can be used for a number of applications, such as the transconductance stage for mixer circuits and gm-c filter circuits. This circuit is capable of providing a wider linear range of operation and lower total harmonic distortion compared with the conventional emitter-degenerated emitter-coupled differential pair due to the global feed-back technique used. Simulation results show that this circuit can provide 30dB improvement in total harmonic distortion over an operating range from -0.5V to +0.5V. This circuit uses a supply voltage of plusmn2.5V and an emitter degeneration resistor of 600 Omega.
Keywords :
amplifiers; circuit simulation; convertors; emitter-coupled logic; harmonic distortion; V-I circuit; bipolar differential voltage-to-current converter; circuit simulation; emitter degeneration resistor; harmonic distortion; low-distortion transconductance amplifier; Circuit simulation; Current supplies; Feedback; Integrated circuit technology; Linearity; Mirrors; Resistors; Total harmonic distortion; Transconductance; Voltage; Transconductance; current mirror; low distortion; voltage-to-current converter;
Conference_Titel :
Design and Technology of Integrated Systems in Nanoscale Era, 2008. DTIS 2008. 3rd International Conference on
Conference_Location :
Tozeur
Print_ISBN :
978-1-4244-1576-2
Electronic_ISBN :
978-1-4244-1577-9
DOI :
10.1109/DTIS.2008.4540221
