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Comparator applications

About: Comparator applications is a research topic. Over the lifetime, 2518 publications have been published within this topic receiving 26639 citations.


Papers
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Proceedings ArticleDOI
06 Jan 2007
TL;DR: A novel comparator architecture is proposed for speed operation in low voltage environment and is embedded in a continuous time sigma-delta ADC so as to reduce the quantizer delay and hence minimizes the excess loop delay problem.
Abstract: A novel comparator architecture is proposed for speed operation in low voltage environment. Performance comparison with a conventional regenerative comparator shows a speed-up of 41%. The proposed comparator is embedded in a continuous time sigma-delta ADC so as to reduce the quantizer delay and hence minimizes the excess loop delay problem. A performance enhancement of 1dB in the dynamic range of the ADC is achieved with this new comparator. We have implemented this ADC in a standard single-poly 8-Metal 0.13 mum UMC process. The entire system operates at 1.2 V supply providing a dynamic range of 32 dB consuming 720 muW of power and occupies an area of 0.1 mm2.

13 citations

Patent
29 Mar 1948

13 citations

Patent
18 Sep 1980
TL;DR: In this article, the primary winding of an ignition coil is placed in series with the collor of a switching transistor, and the collector is also connected to a level comparator and the base receives a two-state control signal which is synchronous with the rotation of the engine.
Abstract: The primary winding of an ignition coil is placed in series with the collor of a switching transistor. In order to protect the transistor against overvoltages, the collector is also connected to a level comparator and the base receives a two-state control signal which is synchronous with the rotation of the engine. One input of the comparator is connected through a divider network to the collector of the transistor and the outer input is connected to a fixed direct-current voltage source. Provision is also made for an error amplifier connected to the output of the comparator, and for a summing circuit which is connected to the control input of the transistor and receives the control signal.

13 citations

Patent
Yun-Shiang Shu1
02 Oct 2014
TL;DR: In this article, a comparator has a differential pair circuit and a current control circuit, and an amplifier has an amplifier and a reset circuit, coupled in series with the comparator circuit and configured to provide unequal abilities of drawing currents for first and second comparator transistors.
Abstract: A comparator has a differential pair circuit and a current control circuit. The differential pair circuit has first and second comparator transistors, and is arranged to compare a first input and a second input according to a clock signal to generate a result indicating whether a difference of the first and second inputs exceeds an internal offset. The current control circuit is coupled in series with the differential pair circuit, and configured to provide unequal abilities of drawing currents for the first and second comparator transistors. An amplifier circuit is also disclosed, having a differential pair circuit, a current control circuit, an amplification circuit and a reset circuit.

13 citations

Patent
Robert H. Leonowich1
15 Nov 1990
TL;DR: In this paper, a crystal oscillator is presented for low jitter (low phase noise) applications, such as in frequency synthesizers or digital repeaters, where two terminals of a resonator are coupled to the input and output of an amplifier, the amplifier together with other components effecting a negative impedance.
Abstract: An oscillator, such as a crystal oscillator, is presented for low jitter (low phase noise) applications, such as in frequency synthesizers or digital repeaters. The two terminals of a resonator are coupled to the input and output of an amplifier, the amplifier together with other components effecting a negative impedance. The inputs of a comparator are connected to the terminals of the resonator. The output of the comparator, preferably differential, is a signal having a frequency substantially determined by the resonator.

13 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202319
202269
20185
201747
201687
2015100