C-media Electronics Inc.

Melten Corporation

Chih-Hung Tseng

Wen-Lung Shieh

Eric Cheng

Fang-Chi Wu

Hipolk Lu

A cart includes a main body, wheels, first drawers, at least one collecting bin and at least one driving unit. The wheels are disposed on the bottom of the main body. The first drawers are contained in a front space of the main body and are configured to be pulled out of the main body via a front surface thereof. The collecting bin is contained in a rear space of the main body. The collecting bin has an opening and an accommodation space communicated with the opening. The opening is located in the rear space such that the accommodation space is not exposed to the outside of the main body. The driving unit is coupled to the collecting bin and configured to receive an external triggering to turn the collecting bin out of the main body via a rear surface thereof, to expose the opening and the accommodation space.

Cart with collecting bin

The scheme for detecting the plug-in status by using single bit generated by a network with serial resistors, comprising a plurality of jacks having a spring switch, wherein the number of the plurality of jacks can be selected depending on the demand and a plurality of resistors followed the spring switch and connected in serial. Output voltage-generating resistor is coupled to the plurality of resistors in parallel to obtain the output voltage, thereby determining the plug-in status. Wherein the plurality of jacks and the plurality of resistors construct a multi-jack network, a first terminal of the multi-jack network refers to a common node between a first connecting terminals of the spring switch of the plurality of jacks and a first resistor of the plurality of resistors, the first terminal being coupled to a first reference voltage, a second terminal of the multi-Jack network refers to a common node between the second connecting terminals of the last jack and the last resistor. Wherein the output voltage-generating resistor is coupled between the second terminal of the multi-jack network and a second reference voltage.

Structure for detecting plug/unplug status of phone-jacks by single bit generated by a resistor network

System of multi-channel shared resistor-string digital-to-analog converters comprises a time-sharing interpolator converting the multi-channel digital audio input at low sample rate to the multi-channel digital audio output at high sample rate, a time-sharing sigma-delta modulator modulating the multi-channel digital audio input with a long sample wordlength from the interpolator to be a multi-channel digital audio output with a shorter sample wordlength, multi-channel shared resistor-string digital-to-analog converters converting the multi-channel digital audio input to be a multi-channel staircase analog signal output, and one low-order RC filter for each channel further attenuating the out-of-band noise in the analog staircase analog output, especially the high-frequency residue images.

System of multi-channel shared resistor-string digital-to-analog converters and method of the same

A self-balanced active current bridge for measuring the impedance of an external device or an output current, including an input potential source and operation amplifier connected to the input potential source via a first input terminal of the operation amplifier. A balancing bridge is coupled to a first output terminal and a second output terminal of the operation amplifier. A controlled potential source is coupled to the balancing bridge and used to maintain the balance state of the balancing bridge. A resistance is connected between the balancing bridge and an output terminal of the controlled potential source. Wherein the external device is connected a first node between the balancing bridge and a second input terminal of the operation amplifier. Wherein the controlled potential source is coupled to the balancing bridge to maintain the balance state, thereby constructing the self-balanced active current bridge for measuring the impedance of the external device or the output current by means of measuring the parameters of the resistance.

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Taipei, Taiwan

Chih-Hung Tseng