Invention Grant
- Patent Title: Schmitt trigger with threshold voltage close to rail voltage
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Application No.: US14270296Application Date: 2014-05-05
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Publication No.: US10063218B2Publication Date: 2018-08-28
- Inventor: Dan Shen
- Applicant: Cirrus Logic, Inc.
- Applicant Address: US TX Austin
- Assignee: Cirrus Logic, Inc.
- Current Assignee: Cirrus Logic, Inc.
- Current Assignee Address: US TX Austin
- Agency: Jackson Walker L.L.P.
- Main IPC: H03F99/00
- IPC: H03F99/00 ; H03K3/037 ; H03F3/217 ; H03K3/3565

Abstract:
Voltage level shifting in a switching output stage is presented. The circuit may include a switching output stage configured to receive an analog input signal and provide a responsive digital output signal, the switching output stage having a first switching device coupled to a first supply voltage and a second switching device coupled to a second supply voltage, the first switching device and the second switching device being coupled to a common output node. The apparatus may also include a voltage level shifter circuit coupled to a switching control node of the second switching device, the voltage level shifter configured to shift a voltage level at the switching control node of the second switching device relative to the analog input signal, wherein the digital output signal at the common output node transitions as the input signal reaches a predetermined threshold value.
Public/Granted literature
- US20150318844A1 SCHMITT TRIGGER WITH THRESHOLD VOLTAGE CLOSE TO RAIL VOLTAGE Public/Granted day:2015-11-05
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