Abstract: Embodiments of the present disclosure provide a pixel circuit and a backplane and a display device thereof. The pixel circuit is used for being provided on the backplane of the display device, and includes a data selecting circuit, a latch circuit, a driving circuit, and a switching circuit. The latch circuit is configured to control the data selecting circuit to switch between different data paths on a basis of time axis. The data selecting circuit is configured to provide corresponding grayscale signal, so that the driving circuit generates the corresponding light-emitting signal, and provides the same to the electroluminescent element via the switching circuit to drive the electroluminescent element to emit light with different grayscales. By switching between different data paths, a high bit depth can be achieved, and the real grayscale of pixels can be presented, the mixing problems of grayscales caused by small data ranges are improved and the display quality of the display device is increased.

Abstract: A spread spectrum coding method. First, a data signal containing a DC component is encoded into an encoded data signal without any DC component. The encoded data signal excluding any DC component is then spread with a spreading code to generate a transmission signal, wherein the transmission signal does not contain any DC component. Furthermore, an alternative method is to spread a data signal with a spreading code to generate a transmission signal, wherein the data signals, spreading codes, and transmission signals all contain a DC component. The transmission signal is then encoded to remove the DC component.

Abstract: A television (TV) tuner includes a first mixer having an input terminal coupled to a received RF signal for producing an intermediate frequency signal, a notch filter having an input terminal coupled to the intermediate frequency signal for removing a first range of signals centered at a first center frequency in the intermediate frequency signal, a band-pass filter having an input terminal coupled to the intermediate frequency signal for passing a second range of signals centered at a second center frequency in the intermediate frequency signal, and a second mixer having inputs coupled to a filtered intermediate frequency signal for producing a first output signal. The filtered intermediate frequency signal is received from an output of the notch filter and the band-pass filter.

Abstract: A television (TV) tuner includes a first mixer for mixing a received RF signal with a first local oscillator signal to produce an intermediate frequency signal, a second mixer for mixing the intermediate frequency signal with a second local oscillator signal for producing an in-phase baseband output signal, a third mixer for mixing the intermediate frequency signal with a third local oscillator signal for producing a quadrature-phase baseband output signal, the third local oscillator signal being the second local oscillator signal phase delayed, and a single phase locked loop (PLL) coupled to the first mixer and the second mixer unit for generating the first local oscillator signal and the second local oscillator signal according to a selected channel in the received RF signal.

Abstract: A television (TV) tuner includes a first mixer having an input terminal coupled to a received RF signal for producing an intermediate frequency signal, a notch filter having an input terminal coupled to the intermediate frequency signal for removing a first range of signals centered at a first center frequency in the intermediate frequency signal, a band-pass filter having an input terminal coupled to the intermediate frequency signal for passing a second range of signals centered at a second center frequency in the intermediate frequency signal, and a second mixer having inputs coupled to a filtered intermediate frequency signal for producing a first output signal. The filtered intermediate frequency signal is received from an output of the notch filter and the band-pass filter.

Abstract: A television (TV) tuner includes a first mixer for mixing a received RF signal with a first local oscillator signal to produce an intermediate frequency signal, a second mixer for mixing the intermediate frequency signal with a second local oscillator signal for producing an in-phase baseband output signal, a third mixer for mixing the intermediate frequency signal with a third local oscillator signal for producing a quadrature-phase baseband output signal, the third local oscillator signal being the second local oscillator signal phase delayed, and a single phase locked loop (PLL) coupled to the first mixer and the second mixer unit for generating the first local oscillator signal and the second local oscillator signal according to a selected channel in the received RF signal.

Abstract: A spread spectrum coding method. First, a data signal containing a DC component is encoded into an encoded data signal without any DC component. The encoded data signal excluding any DC component is then spread with a spreading code to generate a transmission signal, wherein the transmission signal does not contain any DC component. Furthermore, an alternative method is to spread a data signal with a spreading code to generate a transmission signal, wherein the data signals, spreading codes, and transmission signals all contain a DC component. The transmission signal is then encoded to remove the DC component.

Abstract: The present invention discloses an FSK/GFSK demodulator with digital frequency offset compensation, comprising: an FSK/GFSK signal demodulator, for receiving a transmission signal from an antenna and generating an inter-medium frequency (base-frequency) signal after amplification and filtering; an analog-to-digital converter (ADC), for receiving the inter-medium frequency (base-frequency) signal from the FSK/GFSK signal demodulator and converting the signal into a digital signal; a digital frequency discriminator, for receiving the digital signal from the analog-to-digital converter and generating a discriminated signal; a digital band-pass filter, for filtering off a high-frequency component and a DC component of the discriminated signal and generating a demodulated signal; and a data slicer, for receiving the demodulated signal and generating a received signal. The digital band-pass filter is composed of a digital low-pass filter and a digital high-pass filter connected in series.