Sanduleanu, Maastricht
Mihai Adrian Tiberiu Sanduleanu, Maastricht NL
Patent application number | Description | Published |
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20090121789 | DEVICE COMPRISING A FEEDBACK-LESS GAIN CONTROLLED AMPLIFIER | 05-14-2009 |
20090278603 | ALL N-TYPE TRANSISTOR HIGH-SIDE CURRENT MIRROR - The present invention relates to an all n-type transistor current mirror for mirroring an input current to an output current. The current mirror comprises an input n-type transistor (T | 11-12-2009 |
20100205488 | FAST PHASE-FREQUENCY DETECTOR ARRANGEMENT - The present invention relates to a detector arrangement and a charge pump circuit for a recovery circuit recovering timing information for random data. The detector arrangement comprises first latch means for sampling a quadrature component of a reference signal based on an input signal, to generate a first binary signal, a second latch means for sampling an in-phase component of the reference signal based on the input signal, to generate a second binary signal, and a third latch means for sampling the first binary signal based on the second binary signal, to generate a frequency error signal. Thus, a simple and fast detection circuitry can be achieved based on a digital implementation. Furthermore, the charge pump circuit comprises a differential input circuit and control means for controlling a tail current of the differential input circuit in response to a frequency-locked state of frequency detector arrangement. This provides the advantage that behavior of the charge pump circuit can alleviate extra ripple generated by the detector arrangement. | 08-12-2010 |
Mihai A.t Sanduleanu, Maastricht NL
Patent application number | Description | Published |
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20080284488 | Mixer Circuit - A subharmonic mixer circuit having an input stage ( | 11-20-2008 |
20090219105 | POLAR MODULATION APPARATUS AND METHOD WITH COMMON-MODE CONTROL - The present invention relates to a polar modulation apparatus and method, in which a polar-modulated signal is generated based on separately processed phase modulation (PM) and amplitude modulation (AM) components of an input signal. An amplified polar modulated output signal is generated in accordance with the phase modulation and amplitude modulation components by using a differential power amplifier circuitry ( | 09-03-2009 |
20120119840 | POLAR MODULATION APPARATUS AND METHOD WITH COMMON-MODE CONTROL - The present invention relates to a polar modulation apparatus and method, in which a polar-modulated signal is generated based on separately processed phase modulation (PM) and amplitude modulation (AM) components of an input signal. An amplified polar modulated output signal is generated in accordance with the phase modulation and amplitude modulation components by using a differential power amplifier circuitry( | 05-17-2012 |
Mihai A. T. Sanduleanu, Maastricht NL
Patent application number | Description | Published |
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20080252381 | Transformer Circuit - A BALUN circuit ( | 10-16-2008 |
20090295454 | LOW VOLTAGE MIXER CIRCUIT - A mixer circuit ( | 12-03-2009 |
20090295465 | ALL NPN-TRANSISTOR PTAT CURRENT SOURCE - The present invention relates to an improved PTAT current source and a respective method for generating a PTAT current. Opportune collector currents are generated and forced in two transistors exploiting the logarithmic relation between the base-emitter voltage and the collector current of a transistor. A resistor senses a voltage difference between the base-emitter voltages of the two transistors, which can have either the same or different areas. A fraction of the current flowing through the resistor is forced into a transistor collector and mirrored by an output transistor for providing an output current. By this principle an all npn-transistor PTAT current source can be provided that does not need pup transistors as in conventional PTAT current sources. The invention is generally applicable to a variety of different types of integrated circuits needing a PTAT current reference, especially in modern advanced technologies as InP and GaAs where p-type devices are not available. For example, the PTAT current source circuit of the invention can be used in radio frequency power amplifiers, in radio frequency tag circuits, in a satellite microwave front-end. | 12-03-2009 |
20100231314 | RADIO FREQUENCY PWM & PPM MODULATOR - The present invention relates in general to transferring the envelope information of a polar modulated signal to a varying pulsewidth signal, while the phase modulation is direct transferred to the phase modulation of this PWM signal. Accordingly, the resultant signal is a PWM-PPM-signal. Such a signal can efficiently amplified by use of switching amplifying stages. By the present invention four pre-distorted baseband signals are applied basically to 4 linear RF mixers and a two adders, which are, the only needed external RF building blocks to build the modulator according to the invention. That is, the basic idea of the invention resides in the way of modulation of the four baseband signals and the way of combining of the RF modulated signals. | 09-16-2010 |
Mihal A. T. Sanduleanu, Maastricht NL
Patent application number | Description | Published |
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20100219896 | Quadrature Oscillator With High Linearity - The present invention relates to an oscillator circuit and a method of controlling the oscillation frequency of an in-phase signal and a quadrature signal. First oscillator means ( | 09-02-2010 |