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Patent
AIROHA TECHNOLOGY Corporation | Date: 2016-04-25

The present invention relates to a surface acoustic wave filter device with floating units. The surface acoustic wave filter device comprises a piezoelectric substrate, at least one interdigitated transducer configuration and at least one floating unit. The interdigitated transducer configuration comprises a plurality of interdigitated transducer units disposed on the piezoelectric substrate. The floating unit is disposed between adjacent interdigitated transducer units, and covers partial region of adjacent interdigitated transducer units to reduce the BAW scattering of the surface acoustic wave filter device, and can be used to improve the amplitude and phase balances of the surface acoustic wave filter devices.


Patent
AIROHA TECHNOLOGY Corporation | Date: 2015-01-12

The present invention is related to an adjustable harmonic filtering device, mainly comprising a first connecting port, a second connecting port, a harmonic filtering unit, and an adjusting unit, in which a passive network is presented between the first connecting port and the second connecting port, as well as the harmonic filtering unit is connected to the passive network. The harmonic filtering unit comprises a first inductor and a first capacitor. The adjusting unit is adjacent to the first inductor of the harmonic filtering unit, and induced electromagnetically therewith. Thus, frequency-band of the harmonic, to be filtered out by the harmonic filtering unit, may be changed, allowing for reducing loss of signal occurring in the process of transmission between the first connecting port and the second connecting port effectively.


The present invention is related to a communication device capable of self-detecting operation status and detecting method thereof. The communication device comprises at least one communication module and a control module. The communication module is capable of self-detecting operation status, so as to generate at least one status information. The control module is allowed to read out the status information of the communication module via a Mobile Industry Processor Interface (MIPI). When the need for the adjustment of operation status of the communication module is diagnosed by the control module, a control signal is generated, and the control signal is transmitted to the communication module via the MIPI, so as to adjust operation status of the communication module. As such, the communication module may be operated under its best status, and also reduce the probability of overheating or abnormal operation.


Patent
AIROHA TECHNOLOGY Corporation | Date: 2016-03-18

A wideband front-end device comprises a wideband amplifying module and a plurality of narrow band filters. The wideband amplifying module comprises an input end, a plurality connecting ends and at least one receiving end. A wideband transmitting RF signal can be transmitted to one of the connecting ends from the input end according to the frequency band thereof. Thus, the wideband transmitting RF signal can be divided into several narrow band signals with different frequency bands. Each narrow band signal with different frequency bands is transmitted to different connecting ends and narrow band filters respectively. Therefore, each narrow band filter can be used to filter wideband transmitting RF signal or narrow band signals with different frequency bands respectively to reduce production costs of the wideband front-end device.


Patent
AIROHA TECHNOLOGY Corporation | Date: 2015-05-26

An apparatus and method for improved processing of audio and video in the wireless multimedia communication. By setting a SNR estimator in the de-modulator and connecting a PLC trigger between the de-modulator and the PLC module in parallel. The SNR estimator can calculate the signal to noise ratio (SNR) of the wireless signal in the de-modulator directly. The PLC trigger can calculate the losing condition of the digital signal and make the decision whether proceeds the packet loss concealment (PLC) depend on the condition to make the PLC to the highest efficiency.


Patent
AIROHA TECHNOLOGY Corporation | Date: 2016-03-08

The present invention relates to a control method of an RF switch module. The RF switch module comprises a control device and a switch device. The control device is electrically connected to the switch device, and the control device is able to provide a control voltage to the switch device, and turn on or turn off the switch device. Further, the control device determines frequency or voltage value of the control voltage provided to the switch device according to the power or frequency of an RF signal transmitted by the switch device.


Patent
AIROHA TECHNOLOGY Corporation | Date: 2015-01-22

The present invention is related to an audio amplifier with RF interference suppression function, mainly comprising at least one amplifying unit and a speaker. The amplifying unit comprises a first input end, a second input end and an output end, in which a feedback circuit is presented between the first input end and the output end. The feedback circuit is provided therein with at least one resistor and at least one capacitor, in which the resistor is situated between the first input end and the output end, while one end of the capacitor is connected to the feedback circuit. RF signals entering from the speaker may be filtered out through the provision of the resistor and the capacitor in the feedback circuit. Thereby, interference generated on the audio amplifier due to RF signals is suppressed.


Patent
AIROHA TECHNOLOGY Corporation | Date: 2016-01-07

A method for improving circuit stability is disclosed. In the method of the present invention, the circuit is analyzed to find the frequency band in which the input impedance at a target node behaves as a negative resistance, and then find the signal path of the frequency band in the matching circuit in front of the target node and add an attenuator in the signal path. This prevents the circuit from oscillation and improves the stability of the circuit. Furthermore, the signal on the main signal path will not be attenuated and the performance of the circuit will be maintained.


Patent
AIROHA TECHNOLOGY Corporation | Date: 2016-02-17

The present invention relates to a power control method of an amplifying module. The amplifying module comprises a control device and an amplifying device, wherein the control device is electrically connected to the amplifying device and provides a bias current and a supply voltage to the amplifying device. Further, the control device is able to adjust the supply voltage, the bias current or the bias voltage provided to the amplifying device according to the power mode of the amplifying device.


Patent
AIROHA TECHNOLOGY Corporation | Date: 2016-01-20

The present invention relates to a low loss antenna switch. The antenna switch comprises a plurality of switch module and a plurality of transmitting/receiving terminals, wherein one end of each switch module is connected to an antenna unit and the other end of each switch module is connected to each transmitting and receiving end respectively. Further, each switch module comprises a plurality of switch units in series, wherein the width of at least one switch unit is smaller than other switch units of each switch module. Thus, the parasitic capacitance of the off-stage switch modules can be reduced, and VSWR (Voltage Standing Wave Ratio) of the antenna switch also can be improved.

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