Patents by Inventor Johannes Groeneveld
Johannes Groeneveld 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).
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Patent number: 10367414Abstract: A switch mode power supply is described including a primary side for coupling to a mains supply and a secondary side for coupling to a device, an isolation transformer comprising a primary coil and a secondary coil and arranged to isolate the primary side from the secondary side, and a noise filter coupled between a primary ground at the primary side and a secondary ground at the secondary side, the noise filter having a conductance value that varies with frequency. The noise filter conductance comprises a peak conductance in a peak conductance frequency region. The noise filter is operable to reduce the common-mode noise of the switch mode power supply at frequencies occurring in the peak conductance frequency region.Type: GrantFiled: April 11, 2017Date of Patent: July 30, 2019Assignee: NXP B.V.Inventors: Marcel Wilhelm Rudolf Martin van Roosmalen, Petrus Cornelis Theodorus Laro, Humphrey de Groot, Bobby Jacob Daniel, Arjan van den Berg, Dirk Wouter Johannes Groeneveld
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Publication number: 20170302164Abstract: A switch mode power supply is described including a primary side for coupling to a mains supply and a secondary side for coupling to a device, an isolation transformer comprising a primary coil and a secondary coil and arranged to isolate the primary side from the secondary side, and a noise filter coupled between a primary ground at the primary side and a secondary ground at the secondary side, the noise filter having a conductance value that varies with frequency. The noise filter conductance comprises a peak conductance in a peak conductance frequency region. The noise filter is operable to reduce the common-mode noise of the switch mode power supply at frequencies occurring in the peak conductance frequency region.Type: ApplicationFiled: April 11, 2017Publication date: October 19, 2017Inventors: Marcel Wilhelm Rudolf Martin van Roosmalen, Petrus Cornelis Theodorus Laro, Humphrey de Groot, Bobby Jacob Daniel, Arjan van den Berg, Dirk Wouter Johannes Groeneveld
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Patent number: 8963431Abstract: A circuit is disclosed for driving a plurality of LED strings from an AC supply and arranged to, in use, drive current through a series arrangement of a plurality N of the LED strings when the AC voltage is sufficient to drive the plurality N of the LED strings: the circuit comprising a first current source configured to be switchably connected to a one end of said series arrangement of N LED strings; a series combination of a second current source and a heat dissipater, wherein the series combination of the second current source and the heat dissipater is arranged in parallel with the first current source; and a current balancer for balancing the current through the first current source and the second current source. A driver for such a circuit is also disclosed.Type: GrantFiled: March 21, 2013Date of Patent: February 24, 2015Assignee: NXP B.V.Inventors: Arjan van den Berg, Jie Chen, Wihelmus Hinderikus Maria Langeslag, Anton Cornelis Blom, Dirk Wouter Johannes Groeneveld
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Patent number: 6871663Abstract: The invention relates to a pneumatic, reciprocating rotary driving mechanism unit for operating a shut-off member in a shut-off valve, comprising a substantially closed housing, in which a drive shaft (30) is journalled, a pneumatic control valve (39-42) for controlling said drive shaft and first signal transmitting means (54, 55) for delivering control signals to said pneumatic control valve, wherein the housing consists of a base part (48), in which the drive shaft and the pneumatic control valve are present, and a first function part (53), in which the first signal transmitting means are present, which first function part is detachably and exchangeably connected to said base part so as to make it possible to exchange said first function part for a second function part containing second signal transmitting means of a type for the purpose of changing the manner in which the drive shaft can be controlled.Type: GrantFiled: October 11, 2001Date of Patent: March 29, 2005Assignee: EL-O-Matic B.V.Inventor: Floris Johannes Groeneveld
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Publication number: 20040089341Abstract: The invention relates to a pneumatic, reciprocating rotary driving mechanism unit for operating a shut-off member in a shut-off valve, comprising a substantially closed housing, in which a drive shaft (30) is journalled, a pneumatic control valve (39-42) for controlling said drive shaft and first signal transmitting means (54, 55) for delivering control signals to said pneumatic control valve, wherein the housing consists of a base part (48), in which the drive shaft and the pneumatic control valve are present, and a first function part (53), in which the first signal transmitting means are present, which first junction part is detachably and exchangeably connected to said base part so as to make it possible to exchange said first function part for a second function part containing second signal transmitting means of a type for the purpose of changing the manner in which the drive shaft can be controlled.Type: ApplicationFiled: April 10, 2003Publication date: May 13, 2004Inventor: Floris Johannes Groeneveld
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Patent number: 6677733Abstract: A DC/DC converter (1), comprising inductive electrical energy storage means (L), switching means (S1, S2) and control means (6). The control means (6) are arranged for selectively operating the switching means (S1, S2) for transferring an amount of electrical energy from the energy storage means (L) to an output of the DC/DC converter (1), for providing a desired output voltage (Vout), in accordance with a two-state switching cycle comprising a minimum and a maximum duty cycle (Dmin, Dmax).Type: GrantFiled: January 17, 2002Date of Patent: January 13, 2004Assignee: Koninklijke Philips Electronics N.V.Inventors: Ferdinand Jacob Sluijs, Dirk Wouter Johannes Groeneveld
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Patent number: 6600300Abstract: A DC/DC converter (1; 20), comprising inductive electrical energy storage means (L), switching means (S1-S4) and means (6; 15) wherein said control means (6; 15) are arranged for selectively operating said switching means (S1-S4) for transferring an amount of electrical energy from said energy storage means (L) to an output of said DC/DC converter (1; 20), for providing a desired output voltage (Vout), characterized by digital control means (6; 15) which are configured for operatively controlling said switching means (S1-S4) for transferring electrical energy in accordance with a switching sequence comprising a ramp-up switching cycle and a ramp-down cycle for substantially charging and decharging of the energy storage means (L).Type: GrantFiled: January 22, 2002Date of Patent: July 29, 2003Assignee: Koninklijke Philips Electronics N.V.Inventors: Dirk Wouter Johannes Groeneveld, Ferdinand Jacob Sluijs
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Publication number: 20020113579Abstract: A DC/DC converter (1), comprising inductive electrical energy storage means (L), switching means (S1, S2) and control means (6).Type: ApplicationFiled: January 17, 2002Publication date: August 22, 2002Inventors: Ferdinand Jacob Sluijs, Dirk Wouter Johannes Groeneveld
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Publication number: 20020105307Abstract: A DC/DC converter (1; 20), comprising inductive electrical energy storage means (L), switching means (S1-S4) and means (6; 15) wherein said control means (6; 15) are arranged for selectively operating said switching means (S1-S4) for transferring an amount of electrical energy from said energy storage means (L) to an output of said DC/DC converter (1; 20), for providing a desired output voltage (Vout), characterized by digital control means (6; 15) which are configured for operatively controlling said switching means (S1-S4) for transferring electrical energy in accordance with a switching sequence comprising a ramp-up switching cycle and a ramp-down cycle for substantially charging and decharging of the energy storage means (L).Type: ApplicationFiled: January 22, 2002Publication date: August 8, 2002Inventors: Dirk Wouter Johannes Groeneveld, Ferdinand Jacob Sluijs
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Patent number: 6404286Abstract: An electrical circuit arrangement (19), comprising an output stage (4) having an output terminal (2) for delivering an output current, and at least one feedback circuit (15, 16) operatively connected to the output terminal (2). A current generator circuit (20), arranged for generating a current which is a fraction of the output current, connects by a resistive element (21) to the output terminal (2), thereby providing improved high frequency feedback stability.Type: GrantFiled: July 10, 2001Date of Patent: June 11, 2002Assignee: Koninklijke Philips Electronics N.V.Inventors: Guido Eduard De Vrieze, Dirk Wouter Johannes Groeneveld
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Publication number: 20020014919Abstract: An electrical circuit arrangement (19), comprising an output stage (4) having an output terminal (2) for delivering an output current, and at least one feedback circuit (15, 16) operatively connected to the output terminal (2). A current generator circuit (20), arranged for generating a current which is a fraction of the output current, connects by a resistive element (21) to the output terminal (2), thereby providing improved high frequency feedback stability.Type: ApplicationFiled: July 10, 2001Publication date: February 7, 2002Inventors: Guido Eduard De Vrieze, Dirk Wouter Johannes Groeneveld
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Patent number: 3964854Abstract: There is disclosed a device for finishing joints between tegular elements applied to a surface. The device consists of a support and at least one head the support being suitable for gripping by the hand and the head being specially shaped to enable the jointing material between the adjacent elements to be finished formed. The head is shaped so that when the device is applied to the adjoining edges of adjacent tegular elements it makes limited contact with the adjoining edges of the elements and has a constantly diminishing transverse dimension in at least one direction along the joint. The head together with the jointing material fully occupies the space between the elements between the regions of contact and if the device is moved along the joint in the direction of the diminishing dimension of the head a smooth and regular surface contour of the jointing material between the edges of the elements is achieved.Type: GrantFiled: June 6, 1974Date of Patent: June 22, 1976Inventor: Johannes Groeneveld
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Patent number: D249014Type: GrantFiled: March 1, 1976Date of Patent: August 22, 1978Inventor: Johannes Groeneveld