摘要:
A Mixed-voltage input and output (I/O) buffer including a pre-driver unit, a bulk-voltage generating unit, a first to a third transistors and an input stage unit is provided. The pre-driver unit outputs a first source/drain and a second signal. The bulk-voltage generating unit determines whether a first voltage or a pad voltage is used as a bulk voltage according to the pad voltage level. A gate of the first transistor receives the first signal, and a bulk, a first source/drain and a second source/drain of the first transistor are respectively coupled to the bulk voltage, the first voltage and the pad. A gate of the third transistor receives the second signal, and a first source/drain and a second source/drain of the third transistor are respectively coupled to the input stage unit for receiving an input signal from the pad and a second voltage.
摘要:
An ESD protection circuit including a clamping module and a detecting module is provided. The clamping module is coupled between a positive power line and a negative power line. The detecting module includes a triggering unit, a resistor, and a MOS capacitor. An output terminal of the triggering unit is used for triggering the clamping module. The resistor is coupled between the positive power line and an input terminal of the triggering unit. The MOS capacitor has a first end and a second end. The first end is coupled to the input terminal of the triggering unit. During a normal power operation, a switching terminal of the triggering unit enables the second end of the MOS capacitor to be coupled with the positive power line. Thereby, the gate tunneling leakage is eliminated and the problem of mistriggering is prevented.
摘要:
A high/low voltage tolerant interface circuit and a crystal oscillator circuit using the same are provided herein. The interface circuit includes a first transistor, a bulk-voltage generator module and an bias module. The first transistor includes a gate, a first source/drain, a bulk coupled to the first source/drain of the first transistor and a second source/drain coupled to an input node. The bulk-voltage generator module is, used to determine whether a first voltage or a predetermined voltage is being provided to the bulk of the first transistor according to the voltage of the input node. The bias module is coupled to the gate of the first transistor. The bias module is used to provide an bias voltage to the gate of the first transistor and makes the first transistor conduct in order to control the voltage of the second source/drain voltage of the first transistor.
摘要:
The present invention discloses a semiconductor-based planar micro-tube discharger structure and a method for fabricating the same. The method comprises steps: forming on a substrate two patterned electrodes separated by a gap and at least one separating block arranged in the gap; forming an insulating layer over the patterned electrodes and the separating block and filling the insulating layer into the gap. Thereby are formed at least two discharge paths. The method can fabricate a plurality discharge paths in a semiconductor structure. Therefore, the structure of the present invention has very high reliability and reusability.
摘要:
The present invention discloses a semiconductor-based planar micro-tube discharger structure and a method for fabricating the same. The method comprises steps: forming on a substrate two patterned electrodes separated by a gap and at least one separating block arranged in the gap; forming an insulating layer over the patterned electrodes and the separating block and filling the insulating layer into the gap. Thereby are formed at least two discharge paths. The method can fabricate a plurality discharge paths in a semiconductor structure. Therefore, the structure of the present invention has very high reliability and reusability.
摘要:
The present invention discloses a symmetric bidirectional silicon-controlled rectifier, which comprises: a substrate; a buried layer formed on the substrate; a first well, a middle region and a second well, which are sequentially formed on the buried layer side-by-side; a first semiconductor area and a second semiconductor area both formed inside the first well; a third semiconductor area formed in a junction between the first well and the middle region, wherein a first gate is formed over a region between the second and third semiconductor areas; a fourth semiconductor area and a fifth semiconductor area both formed inside the second well; a sixth semiconductor area formed in a junction between the second well and the middle region, wherein a second gate is formed over a region between the fifth and sixth semiconductor areas.
摘要:
An ESD protection circuit suitable for applying in an integrated circuit with separated power domains is provided. The circuit includes a P-type MOSFET coupled between a first circuit in a first power domain and a second circuit in a second power domain. A source terminal of the P-type MOSFET is coupled to a connection node for connecting the first circuit and the second circuit. A gate terminal of the P-type MOSFET is coupled to a positive power line of the second power domain. A drain terminal of the P-type MOSFET is coupled to a negative power line of the second power domain. A body terminal of the P-type MOSFET is also coupled to the connection node.
摘要:
An ESD protection circuit including a clamping module and a detecting module is provided. The clamping module is coupled between a positive power line and a negative power line. The detecting module includes a triggering unit, a resistor, and a MOS capacitor. An output terminal of the triggering unit is used for triggering the clamping module. The resistor is coupled between the positive power line and an input terminal of the triggering unit. The MOS capacitor has a first end and a second end. The first end is coupled to the input terminal of the triggering unit. During a normal power operation, a switching terminal of the triggering unit enables the second end of the MOS capacitor to be coupled with the positive power line. Thereby, the gate tunneling leakage is eliminated and the problem of mistriggering is prevented.
摘要:
A high/low voltage tolerant interface circuit and a crystal oscillator circuit using the same are provided herein. The interface circuit includes a first transistor, a bulk-voltage generator module and an bias module. The first transistor includes a gate, a first source/drain, a bulk coupled to the first source/drain of the first transistor and a second source/drain coupled to an input node. The bulk-voltage generator module is, used to determine whether a first voltage or a predetermined voltage is being provided to the bulk of the first transistor according to the voltage of the input node. The bias module is coupled to the gate of the first transistor. The bias module is used to provide an bias voltage to the gate of the first transistor and makes the first transistor conduct in order to control the voltage of the second source/drain voltage of the first transistor.
摘要:
The present invention discloses a symmetric bidirectional silicon-controlled rectifier, which comprises: a substrate; a buried layer formed on the substrate; a first well, a middle region and a second well, which are sequentially formed on the buried layer side-by-side; a first semiconductor area and a second semiconductor area both formed inside the first well; a third semiconductor area formed in a junction between the first well and the middle region, wherein a first gate is formed over a region between the second and third semiconductor areas; a fourth semiconductor area and a fifth semiconductor area both formed inside the second well; a sixth semiconductor area formed in a junction between the second well and the middle region, wherein a second gate is formed over a region between the fifth and sixth semiconductor areas.