ELECTRONIC CIRCUIT COMPRISING COMPLEMENTARY TRANSCONDUCTORS FOR FILTERS AND OSCILLATORS

摘要

An electronic circuit comprises coupled transconductors. The transconductors comprise two complementary differential pairs (P1/P2; N1/N2) whose outputs are connected directly to two output terminals (OA, OB). Two diodes (P3, N3) are arranged in series between the common terminals (BA, BB) of the differential pairs. The common-mode voltage of the differential pairs is available on the node (CM) between the two diodes (P3, N3). The common-mode voltage of the one transconductor (TR2) is used to control one of the bias current sources (P4) of the other transconductor (TR1) and, if desired, also that of the one transconductor (TR2). In this way the common-mode voltage on the output terminals (OA, OB) of the other transconductor (TR1) is fixed.