Cmos schmitt trigger optimal layout portable#

Moreover, the power consumption of this circuit ranges between 85.2 and 120.4 nW, which is the minimum value compared to the recent CMOS Schmitt trigger circuit, and this makes it suitable for ultra-low-power applications such as biomedical devices. An important outcome for a making a design is learning about design, e.g. Clock rates above 600MHz have been observed for 8-tap SOI versions of the lters.

Cmos schmitt trigger optimal layout portable#

The problem lies in the discharge phase (low pulse width), which takes much longer than the charging phase (high pulse width). We have described a family of custom layout 12b CMOS digital lters that are portable across three generations of process technology. Although the designed circuit is designed in the subthreshold region, it has a higher speed, and the variations of the hysteresis width are considerably wider compared to the similar works i.e., the ratio of the hysteresis width to the voltage supply ( Δ W H V d d) is up to 73.2%. A very popular Schmitt Trigger gate IC in the TTL LS family is the 74LS14, which is a set of six inverters, with threshold voltages below 2.5V (which is half the supply voltage). (The Schmitt trigger in our schematic is an inverter. Obviously, the current input is low, so that’s how the Schmitt treats it.

And let’s assume, for the point of argument, that the Schmitt treats <0.8V as low and >2V as high.

From moderate to high variability (3 to 5), the 5 fins layout gains advantage with the supply voltage scaling linearly. For lower variability scenarios the setup recommended is at 1 fin layout and 0.7 V for 1 and 2 WFF. The hysteresis characteristic of the proposed Schmitt trigger can be adjusted by the body bias technique, which is applied to the control transistors of the positive feedback without adding any other elements. Let’s start with a situation where the input to the Schmitt trigger is 0V and this has been stable for a while. Into the robustness analysis, a shift can be observed. The designed Schmitt trigger utilizes the bulk-driven technique and is biased in the weak inversion region that makes it appropriate for operating with a small power supply of 0.4 V.

In this paper, an ultra-low-voltage differential Schmitt trigger with two configurations of voltage-mode and current-mode is proposed.