-
公开(公告)号：US20190386613A1
公开(公告)日：2019-12-19
申请号：US16481625
申请日：2017-02-10
Applicant: Telefonaktiebolaget LM Ericsson (publ)
Inventor： Anna-Karin Stenman
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 in (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.
-
公开(公告)号：US20210391863A1
公开(公告)日：2021-12-16
申请号：US17355716
申请日：2021-06-23
Applicant: Telefonaktiebolaget LM Ericsson (publ)
Inventor： Janne Peltonen , Christian Elgaard , Anna-Karin Stenman
Abstract: An oscillator circuit comprises a crystal oscillator arranged to generate an oscillation signal, a bias current generator arranged to supply a bias current to the crystal oscillator, and a feedback stage arranged to generate a feedback signal in response to an amplitude of the oscillation signal reaching an amplitude threshold. The bias current generator is arranged to: in response to a supply of power to the oscillator circuit being switched on, generate the bias current at an increasing level commencing from a first level; in response to the feedback signal, terminate the increasing; and during subsequent oscillation of the crystal oscillator, supply the bias current at a second level dependent on a final level of the bias current reached when the increasing is terminated.
-
公开(公告)号：US20190268002A1
公开(公告)日：2019-08-29
申请号：US16412777
申请日：2019-05-15
Applicant: Telefonaktiebolaget LM Ericsson (publ)
Inventor： Janne Peltonen , Christian Elgaard , Anna-Karin Stenman
Abstract: An oscillator circuit comprises a crystal oscillator arranged to generate an oscillation signal, a bias current generator arranged to supply a bias current to the crystal oscillator, and a feedback stage arranged to generate a feedback signal in response to an amplitude of the oscillation signal reaching an amplitude threshold. The bias current generator is arranged to: in response to a supply of power to the oscillator circuit being switched on, generate the bias current at an increasing level commencing from a first level; in response to the feedback signal, terminate the increasing; and during subsequent oscillation of the crystal oscillator, supply the bias current at a second level dependent on a final level of the bias current reached when the increasing is terminated.
-
公开(公告)号：US10826500B2
公开(公告)日：2020-11-03
申请号：US16412777
申请日：2019-05-15
Applicant: Telefonaktiebolaget LM Ericsson (publ)
Inventor： Janne Peltonen , Christian Elgaard , Anna-Karin Stenman
Abstract: An oscillator circuit comprises a crystal oscillator arranged to generate an oscillation signal, a bias current generator arranged to supply a bias current to the crystal oscillator, and a feedback stage arranged to generate a feedback signal in response to an amplitude of the oscillation signal reaching an amplitude threshold. The bias current generator is arranged to: in response to a supply of power to the oscillator circuit being switched on, generate the bias current at an increasing level commencing from a first level; in response to the feedback signal, terminate the increasing; and during subsequent oscillation of the crystal oscillator, supply the bias current at a second level dependent on a final level of the bias current reached when the increasing is terminated.
-
公开(公告)号：US20170237441A1
公开(公告)日：2017-08-17
申请号：US15314843
申请日：2014-06-02
Applicant: Telefonaktiebolaget LM Ericsson (publ)
Inventor： Janne Peltonen , Christian Elgaard , Anna-Karin Stenman
CPC classification number: H03L3/00 , H03B5/32 , H03B2200/0012 , H03B2200/0062 , H03B2200/0066 , H03B2200/0082 , H03B2200/0094 , H03L5/00
Abstract: An oscillator circuit (100) comprises a crystal oscillator (10) arranged to generate an oscillation signal, a bias current generator (20) arranged to supply a bias current to the crystal oscillator (10), and a feedback stage (30) arranged to generate a feedback signal in response to an amplitude of the oscillation signal reaching an amplitude threshold. The bias current generator (20) is arranged to: in response to a supply of power to the oscillator circuit (100) being switched on, generate the bias current at an increasing level commencing from a first level; in response to the feedback signal, terminate the increasing; and during subsequent oscillation of the crystal oscillator (10), supply the bias current at a second level dependent on a final level of the bias current reached when the increasing is terminated.
-
公开(公告)号：US11070213B2
公开(公告)日：2021-07-20
申请号：US17028147
申请日：2020-09-22
Applicant: Telefonaktiebolaget LM Ericsson (publ)
Inventor： Janne Peltonen , Christian Elgaard , Anna-Karin Stenman
Abstract: An oscillator circuit comprises a crystal oscillator arranged to generate an oscillation signal, a bias current generator arranged to supply a bias current to the crystal oscillator, and a feedback stage arranged to generate a feedback signal in response to an amplitude of the oscillation signal reaching an amplitude threshold. The bias current generator is arranged to: in response to a supply of power to the oscillator circuit being switched on, generate the bias current at an increasing level commencing from a first level; in response to the feedback signal, terminate the increasing; and during subsequent oscillation of the crystal oscillator, supply the bias current at a second level dependent on a final level of the bias current reached when the increasing is terminated.
-
公开(公告)号：US11356102B2
公开(公告)日：2022-06-07
申请号：US17355716
申请日：2021-06-23
Applicant: Telefonaktiebolaget LM Ericsson (publ)
Inventor： Janne Peltonen , Christian Elgaard , Anna-Karin Stenman
Abstract: An oscillator circuit comprises a crystal oscillator arranged to generate an oscillation signal, a bias current generator arranged to supply a bias current to the crystal oscillator, and a feedback stage arranged to generate a feedback signal in response to an amplitude of the oscillation signal reaching an amplitude threshold. The bias current generator is arranged to: in response to a supply of power to the oscillator circuit being switched on, generate the bias current at an increasing level commencing from a first level; in response to the feedback signal, terminate the increasing; and during subsequent oscillation of the crystal oscillator, supply the bias current at a second level dependent on a final level of the bias current reached when the increasing is terminated.
-
公开(公告)号：US20210006252A1
公开(公告)日：2021-01-07
申请号：US17028147
申请日：2020-09-22
Applicant: Telefonaktiebolaget LM Ericsson (publ)
Inventor： Janne Peltonen , Christian Elgaard , Anna-Karin Stenman
Abstract: An oscillator circuit comprises a crystal oscillator arranged to generate an oscillation signal, a bias current generator arranged to supply a bias current to the crystal oscillator, and a feedback stage arranged to generate a feedback signal in response to an amplitude of the oscillation signal reaching an amplitude threshold. The bias current generator is arranged to: in response to a supply of power to the oscillator circuit being switched on, generate the bias current at an increasing level commencing from a first level; in response to the feedback signal, terminate the increasing; and during subsequent oscillation of the crystal oscillator, supply the bias current at a second level dependent on a final level of the bias current reached when the increasing is terminated.
-
公开(公告)号：US10333526B2
公开(公告)日：2019-06-25
申请号：US15314843
申请日：2014-06-02
Applicant: Telefonaktiebolaget LM Ericsson (publ)
Inventor： Janne Peltonen , Christian Elgaard , Anna-Karin Stenman
Abstract: An oscillator circuit (100) comprises a crystal oscillator (10) arranged to generate an oscillation signal, a bias current generator (20) arranged to supply a bias current to the crystal oscillator (10), and a feedback stage (30) arranged to generate a feedback signal in response to an amplitude of the oscillation signal reaching an amplitude threshold. The bias current generator (20) is arranged to: in response to a supply of power to the oscillator circuit (100) being switched on, generate the bias current at an increasing level commencing from a first level; in response to the feedback signal, terminate the increasing; and during subsequent oscillation of the crystal oscillator (10), supply the bias current at a second level dependent on a final level of the bias current reached when the increasing is terminated.
