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1. (WO2018145759) ELECTRONIC CIRCUIT WITH TUNING CIRCUIT

Pub. No.:    WO/2018/145759    International Application No.:    PCT/EP2017/052997
Publication Date: Fri Aug 17 01:59:59 CEST 2018 International Filing Date: Sat Feb 11 00:59:59 CET 2017
IPC: H03L 7/099
H03B 5/12
Applicants: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventors: STENMAN, Anna-Karin
Title: ELECTRONIC CIRCUIT WITH TUNING CIRCUIT
Abstract:
A differential electronic circuit (25) comprising a tuning circuit (140, 140-i) connected between a first circuit node (110) and a second circuit node (112) of the electronic circuit (25), is disclosed. The tuning circuit (140, 140-i) comprises at least one controllable circuit (150, 150-i), each comprising a first MOS transistor (152) having its drain and source connected to a common node (156) of the controllable circuit (150, 150-i) and its gate connected to a first internal node (158) of the tuning circuit (140, 140-i), and a second MOS transistor (154) having its drain and source connected to the common node (156) of the controllable circuit (150, 150-i) and its gate connected to a second internal node (160) of the tuning circuit (140, 140-i). The tuning circuit comprises a first capacitor (170) operatively connected between the first circuit node (110) and the first internal node (158) of the tuning circuit (140, 140-i) and a second capacitor (172) operatively connected between the second circuit node (112) and the second internal node (160) of the tuning circuit (140, 140-i), and a control circuit (180) configured to provide a variably controllable bias voltage to the first and the second internal nodes (158, 160) of the tuning circuit (140, 140-i) and, to each controllable circuit (150, 150-i), a digitally controllable tuning voltage to the common node (156) of the controllable circuit (150, 150-i). An electronic apparatus and a method are also disclosed.