45results about How to "Reduce popping" patented technology

Presently many audio chips suffer from pop issues, which is especially serious for single ended audio drivers. An audio pop is a disturbance in the output caused by a sudden transition of chip power, particularly when a chip is powered on or powered off. Furthermore, compensation networks included in the amplifiers on audio chips for stability offer a significant path for transmitting power disturbances to the output. Hence, circuitry is developed to suppress pops in the output stages of an amplifier.

A pop-free single-ended output class-D amplifier includes: an input signal generator for generating an input signal; a power supply for supplying input power; a reference voltage generator for generating a reference voltage; a gain-adjustable stage for generating an amplified signal according to the reference voltage and adjusting a gain of the single-ended output class-D amplifier; a pulse width modulation module for outputting a pulse width modulation signal according to the reference voltage, the amplified signal, and the input power; a low-pass filter for low-pass filtering the pulse width modulation signal to generate an output voltage; and a logic controller for generating at least one control signal to control the reference voltage generator, the gain-adjustable stage, and the pulse width modulation module according to the input power, the reference voltage, and the pulse width modulation signal.

The invention relates to a comprehensive utilization method of dust and mud in steelmaking process, which is specifically a spheroiditic slagging agent production process. The invention comprises the following steps: drying dust and mud in the open, adding 2-6% burnt lime and 0.5-1% adhensive to the mud to produce mixture, sending the mixture to agitator to intimate mixing, sending the mixture to roller to be pulverized fully, sending it to pelletizer to produce green-ball of phi20-phi30mm size by roll-type briquetting process in presure of 40-60KN, processing green-ball in jigging screen to get green-ball end product on sifter and sliver as return material under sifter and sending green-ball to tower furnace via charging system to be adglutinate and get end product.

The invention discloses a forming die for a large television backplane. The forming die comprises an upper die and a lower die, wherein the upper die comprises an upper cover plate, an upper block, an upper die base and an upper die plate which are fixedly connected in sequence from top to bottom; the lower die comprises a lower supporting plate, a lower block, a lower die base, a lower cushion block and a clamping plate which are fixedly connected in sequence from bottom to top; the centre of the upper die plate is sunken upwards to form a hollow and arc-shaped cavity; the clamping plate is provided with a first raising puncher, a second raising puncher, a third raising puncher and a fourth raising puncher on positions just below the cavity; and parts raised by the first raising puncher, the second raising puncher, the third raising puncher and the fourth raising puncher during die closing, of the backplane, are a first raised bump, a second raised bump, a third raised bump and a fourth raised bump respectively. The forming die disclosed by the invention is capable of reducing a phenomenon of raised bump burst, thus greatly increasing the forming yield of the raised bumps; and moreover, an S-shaped structure with a certain R angle is formed on the bent sectioned surface of the backplane, the bent sectioned surface is not liable to crack during shaping pulling, and the backplane is high in forming quality, low in industrialization cost, and convenient for increasing economic benefits.