Patents by Inventor Frank Hagemeyer
Frank Hagemeyer 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: 8129963Abstract: The invention relates to a DC to DC converter comprising a DC to DC converter unit (DCW), a first field effect transistor (FET1) for the voltage conversion, a bipolar transistor (BP1) as a starting aid, and a second field effect transistor (FET2) for switching-off the bipolar transistor (BP1). Said bipolar transistor (BP1) is mounted in parallel with the first field effect transistor (FET1), and the second field effect transistor (FET2) is mounted upstream of the bipolar transistor (BP1).Type: GrantFiled: December 20, 2006Date of Patent: March 6, 2012Assignee: Sennheiser electronic GmbH & Co. KGInventors: Frank Hagemeyer, Peter Himmelreich
-
Patent number: 8049091Abstract: A wireless receiver for receiving a wireless transmitted audio signal from a wireless transmitter is provided. The wireless receiver comprises a tuning assisting unit for assisting in the tuning of a music instrument coupled to the wireless transmitter. The tuning assisting unit indicates whether the audio signal from the music instrument corresponds to a specified frequency. The wireless receiver furthermore comprises an audio amplifier for amplifying the received audio signal. The wireless receiver furthermore comprises a housing which incorporates the tuning assisting unit and the audio amplifier.Type: GrantFiled: March 2, 2009Date of Patent: November 1, 2011Assignee: Sennheiser electronic GmbH & Co. KGInventors: Frank Hagemeyer, Stefan Thien, Stephan Scherthan
-
Patent number: 8026758Abstract: There is provided an FM demodulator comprising a transistor (Q323), a filter unit for producing first and second amplitude-modulated signals from a received frequency-modulated signal, wherein the filter unit is coupled to the switching transistor (Q323), and first and second diodes (D300) connected in opposite relationship for rectifying the first and second amplitude-modulated signals of the filter unit. The filter unit has an LC network and is so dimensioned that there is a linear relationship between the output voltage and the input frequency. The demodulator further has an operating point adjusting unit for adjusting an operating point of the transistor. The operating point adjusting unit (100) is adapted to effect operating point adjustment with a noise negative feedback.Type: GrantFiled: September 11, 2009Date of Patent: September 27, 2011Assignee: Sennheiser electronic GmbH & Co. KGInventor: Frank Hagemeyer
-
Publication number: 20110050195Abstract: The invention relates to a DC to DC converter comprising a DC to DC converter unit (DCW), a first field effect transistor (FET1) for the voltage conversion, a bipolar transistor (BP1) as a starting aid, and a second field effect transistor (FET2) for switching-off the bipolar transistor (BP1). Said bipolar transistor (BP1) is mounted in parallel with the first field effect transistor (FET1), and the second field effect transistor (FET2) is mounted upstream of the bipolar transistor (BP1).Type: ApplicationFiled: December 20, 2006Publication date: March 3, 2011Applicant: Sennheiser electronic GmbH & Co. KGInventors: Frank Hagemeyer, Peter Himmelreich
-
Publication number: 20100218661Abstract: A wireless receiver for receiving a wireless transmitted audio signal from a wireless transmitter is provided. The wireless receiver comprises a tuning assisting unit for assisting in the tuning of a music instrument coupled to the wireless transmitter. The tuning assisting unit indicates whether the audio signal from the music instrument corresponds to a specified frequency. The wireless receiver furthermore comprises an audio amplifier for amplifying the received audio signal. The wireless receiver furthermore comprises a housing which incorporates the tuning assisting unit and the audio amplifier.Type: ApplicationFiled: March 2, 2009Publication date: September 2, 2010Applicant: Sennheiser electronic GmbH & Co. KGInventors: Frank Hagemeyer, Stefan Thien, Stephan Scherthan
-
Publication number: 20100085116Abstract: There is provided an FM demodulator comprising a transistor (Q323), a filter unit for producing first and second amplitude-modulated signals from a received frequency-modulated signal, wherein the filter unit is coupled to the switching transistor (Q323), and first and second diodes (D300) connected in opposite relationship for rectifying the first and second amplitude-modulated signals of the filter unit. The filter unit has an LC network and is so dimensioned that there is a linear relationship between the output voltage and the input frequency. The demodulator further has an operating point adjusting unit for adjusting an operating point of the transistor. The operating point adjusting unit (100) is adapted to effect operating point adjustment with a noise negative feedback.Type: ApplicationFiled: September 11, 2009Publication date: April 8, 2010Applicant: Sennheiser electronic GmbH & Co. KGInventor: Frank Hagemeyer
-
Publication number: 20100056060Abstract: There is provided a wireless pocket transmitter comprising an input for receiving signals of a guitar, a capacitance adjusting unit for adjusting an input capacitance of the pocket transmitter, and a wireless transmitter.Type: ApplicationFiled: August 26, 2009Publication date: March 4, 2010Applicant: Sennheiser electronic GmbH & Co. KGInventor: Frank Hagemeyer
-
Publication number: 20010038309Abstract: The subject of this invention is a filter circuit, designed especially for the separation of two channels, with a low-pass filter (10, 14) and an additional all-pass filter (12).Type: ApplicationFiled: February 20, 2001Publication date: November 8, 2001Applicant: Sennheiser Electronic GmbH & Co. KGInventor: Frank Hagemeyer
-
Patent number: 5900788Abstract: A low-noise oscillator circuit with an amplifier element for negative feedback, specifically a transistor. In addition to a positive feedback of the oscillator transistor, provision is made for a negative-feedback loop with a pass band of 0 (thus DC coupling) to 1/4 to 1/100 of the oscillation frequency of the oscillator, in order to regulate out fluctuations of the current of the amplifier element.Type: GrantFiled: December 11, 1997Date of Patent: May 4, 1999Assignee: Sennheiser Electronic GMBH & Co. KGInventor: Frank Hagemeyer