Patent application number | Description | Published |
20100225409 | IQ-Modulation - The present disclosure relates to I/Q modulation circuits, devices, and methods. | 09-09-2010 |
20120220245 | High-Frequency Switching Assembly, Transmitter and Method - A high-frequency switching assembly having a first switching state and a second switching state includes a transmitter and a switch assembly. The transmitter includes a primary side and a secondary side having a first secondary side terminal and a second secondary side terminal and is configured to transmit an HF input signal applied to its primary side to its secondary side by means of inductive coupling. The switch assembly is configured to apply, in one state, a first reference potential to the first secondary side terminal. Further, the switch assembly is implemented to apply, in another state, a second reference potential to the second secondary side terminal. | 08-30-2012 |
20120263217 | Method to Prevent Phenomenon in Vector Modulator Transmitter - One embodiment of the present invention relates to an apparatus for preventing remodulation in a transmission chain. A first offset generation circuit selectively introduces a first frequency offset into in-phase (I) and quadrature phase (Q) equivalent baseband signals. A second offset generation circuit selectively introduces a second frequency offset into an oscillator output signal. The frequency of the offset oscillator output signal is divided by a divider to form offset local oscillator signals, which are provided to up-conversion mixers that modulate the offset equivalent baseband signals onto the offset local oscillator signals to generate a composite modulated output signal. The first and second frequency offsets are chosen to have values that cancel during modulation. However, because the second frequency offset shifts the offset oscillator output signal's frequency to a value that is no longer a harmonic of the composite modulated output signal's frequency, remodulation is prevented. | 10-18-2012 |
20120286983 | RF DAC With Configurable DAC Mixer Interface and Configurable Mixer - One embodiment of the present disclosure relates to a circuit. The circuit includes a digital to analog converter (DAC) configured to convert a time-varying, multi-bit digital value to a corresponding time-varying output current. The circuit also includes a mixer module downstream of the DAC and comprising a plurality of mixers. A control block is configured to selectively steer output current from the DAC to different mixers of the mixer module. Other techniques are also described. | 11-15-2012 |
20130052972 | SIGNAL PROCESSING DEVICE AND METHOD FOR PROVIDING A FIRST ANALOG SIGNAL AND A SECOND ANALOG SIGNAL - A signal processing device for providing first and second analog signals includes first and second clocked digital signal path circuits and a transit time difference measuring device. The first clocked digital signal path circuit is configured to yield first digital data for providing a first analog signal. The second clocked digital signal path circuit is configured to yield second digital data for providing the second analog signal. The transit time difference measuring device is configured to yield a transit time difference measuring signal describing a difference between a signal transit time along a first measuring path and a signal transit time along a second measuring path, with the first measuring path including a first clock supply allocated to the first clocked digital signal path circuit, and with the second measuring path including a second clock supply allocated to the second clocked digital signal path circuit. | 02-28-2013 |
20130251069 | FBR DC VECTOR OFFSET REMOVAL USING LO PHASE SWITCHING - One embodiment relates to a feedback receiver (FBR). The FBR includes a FBR signal input configured to receive a radio frequency (RF) signal, a first local oscillator (LO) signal input configured to receive a first LO signal having an LO frequency, and a second LO signal input configured to receive a second LO signal having the LO frequency. The second LO signal is phase shifted by approximately 90° relative to the first LO signal. FBR also includes a divider that induces a time-varying phase shift in the first and second LO signals while concurrently retaining a 90° phase shift between the first and second LO signals. | 09-26-2013 |
20140044214 | SYSTEMS AND METHODS TO FREQUENCY SHIFT UNWANTED SIGNAL COMPONENTS - A transmission circuit includes a shift circuit, a second shift circuit, and a modulation circuit. The shift circuit is configured to select a shift amount according to shift parameters and to introduce the shift amount in a first direction into in phase and quadrature phase baseband signals. The second circuit is configured to selectively introduce the shift amount in a second direction into local oscillator signals. The modulation circuit is configured to modulate the shifted baseband signals onto the shifted local oscillator signals to generate a composite modulated output signal. Unwanted components of the output signal are shifted away from original or specified limits. Wanted components of the output signal are unshifted. | 02-13-2014 |
20140091959 | RF DAC WITH CONFIGURABLE DAC MIXER INTERFACE AND CONFIGURABLE MIXER - One embodiment of the present disclosure relates to a circuit. The circuit includes a digital to analog converter (DAC) configured to convert a time-varying, multi-bit digital value to a corresponding time-varying output current. The circuit also includes a mixer module downstream of the DAC and comprising a plurality of mixers. A control block is configured to selectively steer output current from the DAC to different mixers of the mixer module. Other techniques are also described. | 04-03-2014 |