Patents by Inventor Sever Cercelaru

Sever Cercelaru has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8989679
    Abstract: A circuit for amplifying radio frequency signals comprising: a terminal for connection to an antenna; a common amplifier arranged in a common-gate configuration between a first node and said terminal; a transmit amplifier operable to amplify a radio frequency signal present at an input node and provide the amplified signal to said first node; and a receive amplifier operable to amplify a radio frequency signal present at said first node and provide the amplified signal to an output node; wherein the circuit is operable in two modes: in a receive mode, the common and receive amplifiers being configured so as to together form a receive cascode for amplifying radio frequency signals received at the terminal; and in a transmit mode, the common and transmit amplifiers being configured so as to together form a transmit cascode for amplifying radio frequency signals applied at the input node.
    Type: Grant
    Filed: July 16, 2010
    Date of Patent: March 24, 2015
    Assignee: Cambridge Silicon Radio Limited
    Inventor: Sever Cercelaru
  • Patent number: 8965316
    Abstract: A circuit tuneable between first and second frequencies comprising gain control circuitry operable to control the gain of the circuit between the first and second frequencies, the gain control circuitry comprising a resistor network having: at least two resistor lines arranged in parallel, each resistor line comprising one or more resistors; and for each resistor line, a switch operable to select or deselect the corresponding resistor line; the resistor lines and switches being arranged such that the net resistance of the resistor network is the parallel sum of each of the selected resistor lines; and logic circuitry configured to control said switches so as to minimize the variation in gain of the circuit between the first and second frequencies.
    Type: Grant
    Filed: July 16, 2010
    Date of Patent: February 24, 2015
    Assignee: Cambridge Silicon Radio Limited
    Inventor: Sever Cercelaru
  • Patent number: 8723601
    Abstract: A differential electronic amplifier including: a first switch connected between a first reference voltage and a first node; a second switch connected between a second reference voltage and a second node; a resonant differential load connected between the first and second nodes and having a centre point connected to a third reference voltage; an output stage constituted by a first side of a transformer; a load impedance connected to a second side of the transformer; a first capacitive element connected between the first side of the transformer and the first node; and a second capacitive element connected between the first side of the transformer and the second node; wherein all inductive elements connected in series between the first and second capacitive elements are inductively coupled to the second side of the transformer.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: May 13, 2014
    Assignee: Cambridge Silicon Radio Limited
    Inventor: Sever Cercelaru
  • Publication number: 20120139644
    Abstract: A circuit for amplifying radio frequency signals comprising: a terminal for connection to an antenna; a common amplifier arranged in a common-gate configuration between a first node and said terminal; a transmit amplifier operable to amplify a radio frequency signal present at an input node and provide the amplified signal to said first node; and a receive amplifier operable to amplify a radio frequency signal present at said first node and provide the amplified signal to an output node; wherein the circuit is operable in two modes: in a receive mode, the common and receive amplifiers being configured so as to together form a receive cascode for amplifying radio frequency signals received at the terminal; and in a transmit mode, the common and transmit amplifiers being configured so as to together form a transmit cascode for amplifying radio frequency signals applied at the input node.
    Type: Application
    Filed: July 16, 2010
    Publication date: June 7, 2012
    Applicant: Cambridge Silicon Radio Limited
    Inventor: Sever Cercelaru
  • Publication number: 20120142294
    Abstract: A circuit tuneable between first and second frequencies comprising gain control circuitry operable to control the gain of the circuit between the first and second frequencies, the gain control circuitry comprising a resistor network having: at least two resistor lines arranged in parallel, each resistor line comprising one or more resistors; and for each resistor line, a switch operable to select or deselect the corresponding resistor line; the resistor lines and switches being arranged such that the net resistance of the resistor network is the parallel sum of each of the selected resistor lines; and logic circuitry configured to control said switches so as to minimise the variation in gain of the circuit between the first and second frequencies.
    Type: Application
    Filed: July 16, 2010
    Publication date: June 7, 2012
    Applicant: Cambridge Silicon radio Limited
    Inventor: Sever Cercelaru
  • Patent number: 7245889
    Abstract: The invention relates to a signal source (S) which comprises a local oscillator (5) for generating a reference frequency signal fo. The signal source comprises: a frequency divider by N (6) connected to the local oscillator (5) and delivering two quadratic square-wave signals (Id, Qd) at a frequency fo/N,N being equal to 2 or 4×n, and n being an integer number, and a multiphase filter (7) which supplies two sinusoidal quadratic signals (Is, Qs) at a frequency equal to m·fo/N on the basis of the quadratic signals (Id, Qd) issued by the frequency divider, m being an odd number. The invention finds its application in direct frequency conversion circuits and transmission circuits used in the field of telecommunication.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: July 17, 2007
    Assignee: NXP BV.
    Inventors: Dominique Brunel, Sever Cercelaru
  • Patent number: 6529720
    Abstract: An integrated circuit includes at least an inductive element and an active region which may include resistive, capacitive and semiconductor elements. The inductive element and part of the active region are superimposed. The integrated circuit has a screen for insulating the active region with respect to an electromagnetic field that the inductive element develops. The screen allows the implementation of inductive elements having high quality factors in integrated circuits of reduced size and in which the electromagnetic interactions between the inductive elements and the other elements are reduced.
    Type: Grant
    Filed: December 20, 1999
    Date of Patent: March 4, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Fabrice Jovenin, Sever Cercelaru
  • Publication number: 20020081983
    Abstract: The invention relates to a signal source (S) which comprises a local oscillator (5) for generating a reference frequency signal fo.
    Type: Application
    Filed: September 24, 2001
    Publication date: June 27, 2002
    Inventors: Dominique Brunel, Sever Cercelaru