摘要:
A method including producing an electronic circuit. The method can include providing a first circuit portion, a second circuit portion, a flying capacitor voltage comparator, an output switching circuit, an electronic circuit first output node, and/or an electronic circuit second output node. The electronic circuit first output node can be electrically coupled to a first gate terminal of a switching converter. The electronic circuit second output node can be electrically coupled to a second gate terminal of the switching converter. The method also can include electrically coupling a voltage sensor output terminal of the flying capacitor voltage comparator to the first circuit second input node of the first circuit portion and the second circuit second input node of the second circuit portion. Other embodiments are disclosed.
摘要:
A DC-DC converter for generating a DC output voltage includes: a digitally controlled pulse width modulator (DPWM) for controlling a switching power stage to supply a varying voltage to an inductor; and a digital voltage feedback circuit for controlling the DPWM in accordance with a feedback voltage corresponding to the DC output voltage, the digital voltage feedback circuit including: a first voltage controlled oscillator for converting the feedback voltage into a first frequency signal and to supply the first frequency signal to a first frequency discriminator; a second voltage controlled oscillator for converting a reference voltage into a second frequency signal and to supply the second frequency signal to a second frequency discriminator; a digital comparator for comparing digital outputs of the first and second frequency discriminators and for outputting a digital feedback signal; and a controller for controlling the DPWM in accordance with the digital feedback signal.
摘要:
A latch architecture for driving unit current cell of a current-steering digital-to-analog converter (DAC) which reduces the drain-source voltage variation of the output current-source transistors and reduces the coupling of unwanted injection of input digital signals as well as clock signals is presented herein. Moreover, this latch helps to achieve lower glitch during code transition with improved dynamic performance. The latch effectively uses the intrinsic RC delay of most transistors within the latch architecture in order to achieve optimal crossing points of complementary control signals. Unwanted input injection or cross-talk is reduced by introducing transistors (904, 906, 932 and 934) that are off during code transitions without compromising the DAC update speed. Conflicts between currently held and new inputs are avoided in an effort to reduce the harmonic distortion. Furthermore, the distortion as a result of the clock signal fed through each transistor in the first and second subcircuit portions cancel each other.
摘要:
Techniques, apparatuses, and systems for interfacing multiple sensors with a biological system can include amplifying signals from respective sensors associated with an external device; modulating the amplified signals based on respective different frequency values; and summing the modulated signals to produce an output signal to stimulate a biological system.
摘要:
Systems and methods for analog to digital conversion charge storage device measurement are presented. In multi-cell charge storage device monitoring systems, accurate measurement of cell voltages is used for protection of the multi-cell device. The disclosed cell referenced solution converts the cell voltage to a digital representation referenced at the cell voltage. The digital representation referenced to the cell voltage is then level shifted to a ground referenced signal suitable for digital post processing. This processing may be used for fault detection of over-voltage, under-voltage, open cell, and similar fault conditions and cell capacity measurements. An example embodiment implements a sigma delta modulator to perform the signal transformation from analog to digital. The disclosed systems and methods may be differential and stackable for multiple cells.
摘要:
A sample-and-hold (SAH) phase detector (PD) is clocked in such a way (using a reverse clocking mode) so as to avoid quantization noise increases due to folding that is generally associated with conventional charge pump based phase detectors. The PD is clocked with a clean clock (reference clock), rather than a divided clock. The SAH PD architecture additionally includes an integrated filtering function.
摘要:
A method including producing an electronic circuit. The method can include providing a first circuit portion, a second circuit portion, a flying capacitor voltage comparator, an output switching circuit, an electronic circuit first output node, and/or an electronic circuit second output node. The electronic circuit first output node can be electrically coupled to a first gate terminal of a switching converter. The electronic circuit second output node can be electrically coupled to a second gate terminal of the switching converter. The method also can include electrically coupling a voltage sensor output terminal of the flying capacitor voltage comparator to the first circuit second input node of the first circuit portion and the second circuit second input node of the second circuit portion. Other embodiments are disclosed.
摘要:
Systems and methods are provided for monitoring a voltage. A level shifter is configured to generate a current proportional to the voltage of the battery cell. A delta-sigma modulator is configured to convert the current into a first density modulated bitstream representing the voltage of the battery cell. A first reference source is configured to provide a second density modulated bitstream representing a first threshold voltage. A first comparator is configured to compare the first density modulated bitstream and the second density modulated bitstream.
摘要:
Systems and methods are provided for monitoring a voltage. A level shifter is configured to generate a current proportional to the voltage of the battery cell. A delta-sigma modulator is configured to convert the current into a first density modulated bitstream representing the voltage of the battery cell. A first reference source is configured to provide a second density modulated bitstream representing a first threshold voltage. A first comparator is configured to compare the first density modulated bitstream and the second density modulated bitstream.
摘要:
A noise-shaped direct digital IF to RF DAC (DIF2RF) with embedded up-converter mixer is presented. The digital IF signal is noised shaped by a band-pass ΣΔ modulator with a single bit IF output followed by a semi-digital current-mode IF filter to attenuate out-of-band quantization noise. A current steering DAC combines scaled values of local oscillator (LO) signals as current sources for performing current steering and upconversion in a single cell.