Practical applications in wireless communications, in order to effectively improve communication effectiveness and AV2188E datasheet and reduce the antenna input power, the antenna will be made with the radiation direction of the structure in order to concentrate radiated power, which would come out of "antenna gain" concept. Simply put, the antenna gain refers to a RF antenna input power to the degree of concentration...

Clearly, the digital circuits than analog circuits has obvious advantages, but in most monitoring and ADSP-21060KS-160 datasheet and control systems, analog circuits is still an integral part. Most of the measured signal is analog, and ADSP-21060KS-160 price and analog signal may be weak, need to enlarge and ADSP-21060KS-160 suppliers and after A / D converted digital signal to the digital circuit (embedded computer) to deal with, and many objects can be controlled required by the ana...

According to the working state regulator, and 95 datasheet and often the power supply is divided into two categories: linear and 95 price and switching power supply regulated power supply. Linear regulated power supply, adjust the tube is operating in the linear state of power supply. In the switching power supply is not in the same switch (in the switching power supply, in general, as the switch to adjust the tube) is working...

PLL circuit in the modems role is as follows: (1) phase-locked loop circuit for FM. Modulation control of the carrier signal frequency, called frequency modulation, referred to as FM. FM VCO circuit can be used, but it has the oscillation frequency stability is not high, the control of the shortcomings of poor linearity. Using PLL, the crystal oscillator circuit output voltage as the PLL input s...

Evaluation of the merits of digital integrated circuits important quality indicators: (1) Reliability: TTL integrated circuit manufacturing process using a sophisticated plane, and 90 datasheet and integration is the junction-type devices, the structure itself determines the device parameters are less vulnerable to the impact of surface states, thus ensuring the stability of TTL integrated circuit parameters and...

When choosing an integrated chip, in addition to device-specific functions, also need to consider the following universal factors. for digital devices: power supply voltage range, signal status and 91 datasheet and level threshold, closing resistor, fan-out factor, the maximum operating power, single-door delay, noise margin, operating temperature range, power and 91 price and packaging and 91 suppliers and so on. Speed ??and power are the t...

SCM are generally internal ROM / EEPROM / Flash for the user stored procedures. To prevent unauthorized access or copying machine microcontroller program, most of the chip are encrypted with an encryption or lock-bit bytes, to protect the chip program. If the programming lock-bit encryption is enabled (locked), you can not use ordinary programmer reads the chip directly within the program, which i...

According to work points, insulated-gate FET can be divided into two kinds of enhanced and 91 datasheet and depleted. Is the so-called enhanced when Vcs = 0 Shi tube is off, with VGs, the majority carriers are attracted to the gate, so as to "enhance" the regions carriers to form a conducting channel. Depletion refers to, Xiao Vcs = O when the channel is formed, together with VGS, enables the majority carrier fl...

Depending on the working principle of power can be divided into three categories: linear regulated power supply, switching power supply and 92 datasheet and charge pump power supply. They each have certain characteristics and 92 price and application, respectively, to make a profile here. 1) linear power supply linear power supply is adjust its internal control operating in the linear range of the name. Generally believed ...

How to Select the filter capacitor, in particular, the choice of the output filter capacitor, the stability of the circuit play a very important role. 50 Hz frequency circuits used in common electrolytic capacitors, the ripple voltage frequency of only 100 Hz, charge and 97 datasheet and discharge time is orders of magnitude of milliseconds. For smaller ripple factor, the required electrical capacity of up to hund...