Abstract:
A nitride based semiconductor device includes a first metallic junction layer, a Schottky junction layer on the first metallic junction layer, a first group III nitride semiconductor layer on the Schottky junction layer, a first insulating pattern layer on the first group III nitride semiconductor layer, the first insulating layer pattern including curved protrusions, a second group III nitride semiconductor layer laterally grown on the first group III nitride semiconductor layer, a first type group III nitride semiconductor layer on the second group III nitride semiconductor layer, the first type group III nitride semiconductor layer being simultaneously doped with aluminum (Al) and silicon (Si), an ohmic junction layer formed on the first type group III nitride semiconductor layer, a second metallic junction layer on the ohmic junction layer, and a metallic supporting substrate on the second metallic junction layer.
Abstract:
A nitride based heterojunction semiconductor device includes a gallium nitride (GaN) layer disposed on a substrate, an aluminum (Al)-doped GaN layer disposed on the GaN layer, an AlGaN layer disposed on the Al-doped GaN layer, an ion-implanted layer disposed in an area on the AlGaN layer, excluding a first area and a second area.
Abstract:
An analog-to-digital converter includes a comparator configured to compare an input signal with a reference signal and to output a comparison signal indicating a corresponding comparison result, a control logic configured to output a control signal for adjusting the reference signal based on the comparison signal, and a reference signal adjusting circuit configured to adjust the reference signal based on the control signal. The comparator includes a first pre-amplifier configured to amplify a difference between the input signal and the reference signal using a first transistor having a first size, a second pre-amplifier configured to amplify the difference between the input signal and the reference signal using a second transistor having a second size different from the first size, and a latch configured to generate the comparison signal using at least one of an output of the first and second pre-amplifiers. The first and second pre-amplifiers share the latch.
Abstract:
Provided are a semiconductor device and an operating method thereof.The semiconductor device includes a mode controller configured to output a first control signal in a first communication mode, and output a second control signal in a second communication mode which is different from the first communication mode; and a configurable circuit configured to generate a first output signal to be transmitted to a first type analog-to-digital converter (ADC) in the first communication mode, and generate a second output signal using a second type ADC in the second communication mode, wherein the configurable circuit comprises a switching circuit configured to change a circuit configuration to a first circuit configuration for generating a first output signal in the first communication mode or to a second circuit configuration for generating a second output signal in the second communication mode, depending on the first control signal or the second control signal received from the mode controller.
Abstract:
A semiconductor may include a semiconductor substrate including a first region and a second region disposed at opposite sides of the first region, a first trench formed in the first region, a buffer layer filling a portion of the first trench, a first semiconductor layer formed on the buffer layer, a second semiconductor layer forming a hetero-junction with the first semiconductor layer on the first semiconductor layer of the first region and a gate electrode formed on the second semiconductor layer of the first region.
Abstract:
An amplifying module having one input terminal and one output terminal and passing an antenna signal input through the input terminal towards the output terminal. The amplifying module includes a first switch connected to the input terminal, a plurality of filters selectable by the first switch, a plurality of amplifiers respectively connected to the plurality of filters and amplifying a signal that has passed through the filters, and a second switch for connecting the amplified signal to the output terminal.
Abstract:
A nitride based heterojunction semiconductor device includes a gallium nitride (GaN) layer disposed on a substrate, an aluminum (Al)-doped GaN layer disposed on the GaN layer, a Schottky electrode disposed in a first area on the Al-doped GaN layer, an AlGaN layer disposed in a second area on the Al-doped GaN layer, and an ohmic electrode disposed on the AlGaN layer. The first area is different from the second area.
Abstract:
An analog-to-digital converter includes a comparator configured to compare an input signal with a reference signal and to output a comparison signal indicating a corresponding comparison result, a control logic configured to output a control signal for adjusting the reference signal based on the comparison signal, and a reference signal adjusting circuit configured to adjust the reference signal based on the control signal. The comparator includes a first pre-amplifier configured to amplify a difference between the input signal and the reference signal using a first transistor having a first size, a second pre-amplifier configured to amplify the difference between the input signal and the reference signal using a second transistor having a second size different from the first size, and a latch configured to generate the comparison signal using at least one of an output of the first and second pre-amplifiers. The first and second pre-amplifiers share the latch.
Abstract:
A semiconductor device may include: a first semiconductor layer having a first band gap; a second semiconductor layer including first and second regions separately disposed on an upper surface of the first semiconductor layer and having a second band gap wider than the first band gap; and a third semiconductor layer disposed between the first and second regions of the second semiconductor layer, extending up to at least a portion of the first semiconductor layer. The third semiconductor layer may have a channel region doped with an impurity.
Abstract:
A nitride-based semiconductor device includes a buffer layer on a substrate, a nitride-based semiconductor layer on the buffer layer, at least one ion implanted layer within the nitride-based semiconductor layer, and a channel layer on the nitride-based semiconductor layer.