Abstract: A two path direct frequency modulation system is disclosed. The system includes a Varactor, a voltage-controlled oscillator (VCO) calibration capacitor bank including a first plurality of switchable capacitors, and a frequency deviation capacitor bank including a second plurality of switchable capacitors. The method includes switching on or off a number of the first plurality of switchable capacitors to obtain a desired frequency band and determining number of cycles within a first predetermined time to obtain a first count, switching on or off a number of the first plurality of switchable capacitors or of the second plurality of switchable capacitors to change the desired frequency band and determining number of cycles within a second predetermined time to obtain a second count, and modulating a data signal by switching on or off a switchable capacitors of the second plurality of switchable capacitors according to the first and the second count.

Abstract: A digital receiver includes a radio frequency analog front end, a digital processing unit, a plurality of cascaded amplifier stages configured to receive output of the radio frequency analog front end, a first analog to digital converter configured to convert an analog signal output from the plurality of cascaded amplifier stages into a digital signal output to the digital processing unit, a first received signal strength indicator unit configured to receive outputs of each of the plurality of cascaded amplifier stages and output signal to the digital processing unit, a second received signal strength indicator unit configured to receive output of at least one amplifier stage in the plurality of cascaded amplifier stages, and a received signal strength indicator detection unit configured to activate and to deactivate digital units according to a comparison of output from the second received signal strength indicator unit to a predetermined threshold.

Abstract: A digital receiver includes a radio frequency analog front end, a digital processing unit, a plurality of cascaded amplifier stages configured to receive output of the radio frequency analog front end, a first analog to digital converter configured to convert an analog signal output from the plurality of cascaded amplifier stages into a digital signal output to the digital processing unit, a first received signal strength indicator unit configured to receive outputs of each of the plurality of cascaded amplifier stages and output signal to the digital processing unit, a second received signal strength indicator unit configured to receive output of at least one amplifier stage in the plurality of cascaded amplifier stages, and a received signal strength indicator detection unit configured to activate and to deactivate digital units according to a comparison of output from the second received signal strength indicator unit to a predetermined threshold.

Abstract: A circuit for RSSI estimation includes a cascaded chain of variable gain amplifier stages, a threshold detector configured to output an indication signal according to a comparison of output of the cascaded chain of variable gain amplifier stages with a predetermined threshold, and an automatic gain controller configured to adjust gain of at least one variable gain amplifier of the cascaded chain of variable gain amplifier stages according to the indication signal. Each stage may include a switch module configured to electrically connect or disconnect an input of the variable gain amplifier of the at least one variable gain amplifier stage to/from an output of a previous variable gain amplifier stage according to a switch control signal.

Abstract: A method of manufacturing a display panel and a display panel are described. A first substrate is provided. A wall structure is formed on the first substrate to define several microcups. A displaying medium is filled into the microcups. Thereafter, a sealing material is formed over the microcups filled with the displaying medium. A second substrate is put over the sealing material and a lamination process is performed, wherein the sealing material which contacts the wall structure bonds the second substrate to the wall structure, and the sealing material which contacts the displaying medium dissolves in the displaying medium.

Abstract: A method of manufacturing a display panel and a display panel are described. A first substrate is provided. A wall structure is formed on the first substrate to define several microcups. A displaying medium is filled into the microcups. Thereafter, a sealing material is formed over the microcups filled with the displaying medium. A second substrate is put over the sealing material and a lamination process is performed, wherein the sealing material which contacts the wall structure bonds the second substrate to the wall structure, and the sealing material which contacts the displaying medium dissolves in the displaying medium.

Abstract: A rice vending machine includes a housing, a rice container, a packing unit and a controlling unit. The controlling unit and the cooperative packing unit make it possible to adjust the amount of the purchased rice as necessary. Therefore, the rice can be more freshly and hygienically reserved without waste. Without man, the rice vending machine can sell the rice without limitation of site and business time so as to lower rice selling cost.