Resources Contact Us Home
Lhermite; Francois
Lasserre, FR
No. of patents:

Patent Number Title Of Patent Date Issued
8174243 Power supply controller and method therefor May 8, 2012
In one embodiment, a switching controller uses an auxiliary winding voltage of a transformer to form a signal representative of current flow through a secondary winding of the transformer. The controller is configured to limit a current through a secondary winding to a maximum value.
7986536 Method of forming a power supply controller and structure therefor July 26, 2011
In one embodiment, a switching controller uses an auxiliary winding voltage of a transformer to form a signal representative of current flow through a secondary winding of the transformer.
7719249 Soft-start circuit and method therefor May 18, 2010
In one embodiment, a soft-start circuit is configured to form drive pulses that increase in width independently of the current through the power switch during a first portion of the soft-start operation period.
7447601 Power supply controller method and structure November 4, 2008
A power supply controller determines the value of an input power and uses the value of the input power to regulate a value of the output voltage.
7443699 Negative current compensation method and circuit October 28, 2008
A power supply controller (10, 60, 70) uses a negative current (36) of a power transistor (16, 71) to detect the valley point for enabling the power transistor when driving an inductor (17). The negative current occurs when the inductor is de-magnetized and can be used for controlling
6477066 Method and apparatus for reducing audible acoustical noise in a power supply transformer by shap November 5, 2002
An apparatus for reducing audible noise in a power supply (16) is provided. The apparatus comprises a shaper circuit (258) located on the secondary side (204) of a transformer (200) that is operable to control the shape of the current through a primary side inductor (222). By changing th
6469484 Power supply circuit and method thereof to detect demagnitization of the power supply October 22, 2002
A regulator circuit (26) operates a switching power supply (10) in discontinuous conduction mode (DCM) by detecting the state of demagnetization of a transformer (16) of the switching power supply. When a primary current (I.sub.p) reaches zero the voltage across a drain and a source
6392906 Circuit and method for a pulse width modulated May 21, 2002
A pwm controller 10 which includes a Vcc node (pin 6); a start-up current source 180 connected to the Vcc node; and a driver circuit 150, 190 also connected to the Vcc node, wherein the pwm controller 10 is arranged to operate in a first phase in which the start-up current source supplie
6369552 Regulated auxiliary power supply April 9, 2002
A charge pump apparatus and a method for operating a charge pump power supply having an input and an output, the output coupled to a load, and the load having a bulk capacitor coupled thereto for providing a voltage source for the load. A source of varying voltage is provided as an input
6208538 PWM control apparatus March 27, 2001
A Pulse Width Modulation (PWM) control circuit is used in a switched-mode power supply (SMPS) having a normal mode and a standby mode, for controlling and regulating the SMPS. An input of the PWM control circuit is arranged to receive a signal indicating an amount of current supplied
6177782 Circuit and method of controlling a regulator with an output feedback signal and devoid of an in January 23, 2001
A power factor correction controller circuit 100 for controlling the duration of each on time phase and off time phase of a switched inductor power factor correction circuit 20, 30, 40, 50, 100 which is adapted for use with a rectifying arrangement 9, 10, 60, 70 producing a substantially
5471167 Circuit for use with a feedback arrangement November 28, 1995
A feedback circuit (10) for use with a feedback arrangement includes an input terminal (12) for receiving a feedback signal from an output of the feedback arrangement. An output terminal (14) is coupled to a regulating arrangement of the feedback arrangement. A sampling arrangement (16)

  Recently Added Patents
Sensor system
Halogen-free flame retardants for epoxy resin systems
Notebook computer
Optimizing federated and ETL'd databases with considerations of specialized data structures within an environment having multidimensional constraint
Multiple angle bend for high-voltage lines
Segmenting video based on timestamps in comments
Avalanche photodiodes having accurate and reproductible amplification layer
  Randomly Featured Patents
Method of compensating phase noise at the receiver end of a data transmission system
Method for preparing surface-modified semiconductive and metallic nanoparticles having enhanced dispersibility in aqueous media
Deep frying and serving implement
Formate salt of O-desmethyl-venlafaxine
Load control device and method thereof for controlling requests sent to a server
Production of 2,5-dimethyl-2,4-hexadiene
Collapsible double image poster
Hot rolled material take-up equipment and take-up method
Smart airbag system