Topic
Schmitt trigger
About: Schmitt trigger is a research topic. Over the lifetime, 2718 publications have been published within this topic receiving 18939 citations.
Papers published on a yearly basis
1 / 2
Papers
TL;DR: A novel Schmitt trigger (ST) based differential 10-transistor SRAM (static random access memory) bitcell suitable for subthreshold operation and does not require any architectural changes from the present 6T architecture is proposed.
Abstract: We propose a novel Schmitt trigger (ST) based differential 10-transistor SRAM (static random access memory) bitcell suitable for subthreshold operation. The proposed Schmitt trigger based bitcell achieves 1.56 x higher read static noise margin (SNM) ( Vdd = 400 mV) compared to the conventional 6T cell. The robust Schmitt trigger based memory cell exhibits built-in process variation tolerance that gives tight SNM distribution across the process corners. It utilizes differential operation and hence does not require any architectural changes from the present 6T architecture. At iso-area and iso-read-failure probability the proposed memory bitcell operates at a lower (175 mV) Vdd with 18% reduction in leakage and 50% reduction in read/write power compared to the conventional 6T cell. Simulation results show that the proposed memory bitcell retains data at a supply voltage of 150 mV. Functional SRAM with the proposed memory bitcell is demonstrated at 160 mV in 0.13 mum CMOS technology.
517 citations
Patent•
1 Apr 1994TL;DR: In this article, a diagnostic instrument for determining a cardiovascular system parameter is presented in the form of a portable pulse oximeter comprising a light to frequency converter (LFC) as a sensor and a photoresistor and capacitor in circuit communication with an inverting Schmitt trigger.
Abstract: A diagnostic instrument for determining a cardiovascular system parameter. In one embodiment, the instrument takes the form of a portable pulse oximeter comprising a light to frequency converter (LFC) as a sensor. Also provided is a light to frequency converter comprising a photoresistor and capacitor in circuit communication with an inverting Schmitt trigger and configured such that the inverter generates a periodic electrical signal corresponding to the amount of electromagnetic radiation illuminating the photoresistor.
207 citations
26 Jun 2019
TL;DR: This work demonstrates a soft, pneumatic ring oscillator that induces temporally coordinated periodic motion in soft actuators using a single, constant-pressure source, without hard valves or electronic controls.
Abstract: Periodic actuation of multiple soft, pneumatic actuators requires coordinated function of multiple, separate components. This work demonstrates a soft, pneumatic ring oscillator that induces temporally coordinated periodic motion in soft actuators using a single, constant-pressure source, without hard valves or electronic controls. The fundamental unit of this ring oscillator is a soft, pneumatic inverter (an inverting Schmitt trigger) that switches between its two states ("on" and "off") using two instabilities in elastomeric structures: buckling of internal tubing and snap-through of a hemispherical membrane. An odd number of these inverters connected in a loop produces the same number of periodically oscillating outputs, resulting from a third, system-level instability; the frequency of oscillation depends on three system parameters that can be adjusted. These oscillatory output pressures enable several applications, including undulating and rolling motions in soft robots, size-based particle separation, pneumatic mechanotherapy, and metering of fluids. The soft ring oscillator eliminates the need for hard valves and electronic controls in these applications.
205 citations
7 Apr 2011
TL;DR: The effective on-to-off ratio can be considerably improved by the use of Schmitt Trigger structures, which effectively reduce the leakage from the gate output node and thereby stabilize the output level.
Abstract: Supply voltage reduction beyond the minimum energy per operation point is advantageous for supply voltage constrained applications, but is limited by the degradation of on-to-off current ratios with decreasing supply. In this work, we show that the effective on-to-off ratio can be considerably improved by the use of Schmitt Trigger structures, which effectively reduce the leakage from the gate output node and thereby stabilize the output level. A method for applying this concept to general logic is presented. Design rules concerning transistor sizing, gate selection and layout necessary to further minimize the required supply voltage are outlined and applied to the design of a chip implementing 8 × 8 bit multipliers as test structures. The only custom design step is the creation of the Schmitt Trigger standard-cell library, otherwise a regular digital tool chain is used. The multipliers exhibit full functionality down to supply voltages of 84 mV-62 mV, depending on the area overhead invested. No process or post-silicon tuning like body biasing is used. At the minimum possible supply voltage of 62 mV, a power consumption of 17.9 nW at an operation frequency of 5.2 kHz is measured for an 8 × 8 bit multiplier.
177 citations
TL;DR: In this article, a CMOS Schmitt trigger design with given circuit thresholds is described, based on studying the transient from one stable state to another when the trigger is in linear operation.
Abstract: CMOS Schmitt trigger design with given circuit thresholds is described. The approach is based on studying the transient from one stable state to another when the trigger is in linear operation. The trigger is subdivided into two subcircuits; each of them is considered as a passive load for the other. This allows the relations governing the deviations of the circuit thresholds from their given values to be obtained. The trigger device sizes are thus determined by the threshold tolerances. >
173 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2025 | 20 |
| 2024 | 37 |
| 2023 | 40 |
| 2022 | 50 |
| 2021 | 41 |
| 2020 | 68 |