Topic
Comparator applications
About: Comparator applications is a research topic. Over the lifetime, 2518 publications have been published within this topic receiving 26639 citations.
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Patent•
20 May 2008TL;DR: In this paper, the authors proposed a pipeline ADC front-end sampling structure that provides a continuous time input signal to a flash comparator for sampling, where no delay is introduced from the need to transfer a DC charge representing the sampled input to the flash comparators.
Abstract: Embodiments of the present invention provide a pipeline ADC front-end sampling structure that provides a continuous time input signal to a flash comparator for sampling. By providing a continuous time input signal to the flash comparator, no delay is introduced from the need to transfer a DC charge representing the sampled input to the flash comparator. Matching sampling networks in the residual generator and the flash comparator are avoided due to the high bandwidth response requirements of the residual generator and the flash comparator when operating on high frequency input signals.
9 citations
TL;DR: A novel monolithic high-speed comparator which senses the polarity of the input current rather than voltage, which greatly reduces overall system conversion time for a successive approximation 12-bit A/D converter.
Abstract: Describes a novel monolithic high-speed comparator which senses the polarity of the input current rather than voltage The new approach greatly reduces overall system conversion time for a successive approximation 12-bit A/D converter The circuit features a single input pin for polarity discrimination, dual complementary outputs, and fast response time of 72 ns to 05 LSB overdrive (500 nA) The sum of the total error due to the comparator is 02 LSB with respect to the input The comparator is manufactured on a bipolar, ion-implanted base, 9 /spl mu/m epi, junction-isolated process
9 citations
Patent•
11 Jun 2003
TL;DR: In this article, an input branch of a loss-of-signal (LOS) detector is coupled to a first input of a comparator, and an operational amplifier is connected between the input and the threshold branches to couple an offset level from the input branch to the threshold branch.
Abstract: An input branch of a loss-of-signal (LOS) detector is coupled to a first input of a comparator. A threshold branch of the LOS detector is coupled to a second input of the comparator. An operational amplifier is connected between the input branch and the threshold branch to couple an offset level from the input branch to the threshold branch. The offset level is then cancelled at the comparator.
9 citations
Patent•
23 Jun 1992
TL;DR: In this article, the authors propose a comparator that uses feedback circuitry to monitor particular voltages within the comparator and adjust them as necessary to mitigate the effect of bias offset within comparators that may result from temperature driven device parameter variations.
Abstract: A comparator that may be used in data communications transmission lines, in particular, an Ethernet Twisted-Pair line. The comparator accepts as input the differential voltage from the transmission lines. The comparator uses feedback circuitry to monitor particular voltages within the comparator and adjust them as necessary to mitigate the effect of bias offset within the comparator that may result from, for instance, temperature driven device parameter variations. The comparator also minimizes the effect of power supply noise. The feedback circuitry ensures that as the comparator input differential voltage approaches zero (i.e., when the comparator outputs should switch from a high voltage to a low voltage or vice versa), the input of a comparator output amplifier is situated in the middle of the high gain region of the output amplifier, ready to quickly trigger switching of the comparator output when the comparator input differential voltage crosses zero volts. In one embodiment, the feedback circuitry comprises an operational amplifier and two resistive-capacitive structures.
9 citations
Patent•
02 Nov 2007
TL;DR: In this article, a fast settling AGC system is proposed, which includes a fast settle comparator that facilitates fast settling of strong radio receiver output signals from a maximum to an intermediate voltage level at the start of each transmission burst.
Abstract: A fast settling AGC system includes a “fast settle” comparator that facilitates fast settling of strong radio receiver output signals from a maximum to an intermediate voltage level at the start of each transmission burst, and a “normal” AGC comparator that further settles the output signal from the intermediate voltage level to a desired target output voltage level at a slower “normal” rate. The gain control signal components generated by both the “fast settle” comparator and the “normal” AGC comparator are summed and applied to the gain control terminal of a variable gain amplifier. The gain control signal component generated by the “fast settle” comparator has a higher current level than the gain control signal component generated by the “normal” comparator, but is terminated when receiver output signal drops to the intermediate voltage level.
9 citations