380MHz RF2175 linear amplifier circuit diagram


Posted on Mar 28, 2007

As shown in FIG constituted by 380MHz RF2175 linear amplifier application circuit. Radio frequency (RF) signal input from 6 feet, after the preamplifier, after the last stage p


380MHz RF2175 linear amplifier circuit diagram
Click here to download the full size of the above Circuit.

ower amplifier output is amplified by 12 and 13 feet. 6 feet and internal amplifier is directly coupled, so plus a blocking coupling capacitor. Output terminals 12, 13 feet and 14 feet are connected inside the chip, usually 12, 13 feet connected together externally as an output signal. 12 and 13 feet as the final stage amplifier power supply terminal, providing a bias current through these pins to the final amplifier. As the foot 14 of the second harmonic filter circuit using a transmission line or an inductor and capacitor form a resonant filter at 2f0, provide low impedance for the second harmonic, effectively shorting the second harmonic. 8 feet to enable voltage VREG, the pin voltage can be controlled so as to control power supply. When the voltage is low, the power amplifier is turned off; when the voltage is high (2.8V), the power amplifier in the standard working condition. 8-pin external 100pF external high frequency filter capacitor. 16 feet to VBIAS, the foot control efficiency at low power mode circuit, the pin should be set to 2.8V at full power.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Magic Wand Conjuring Trick
Stand-by Battery Charger
7 MHz VFO
Electronic Police Siren
Laser Listening Device
Power Supply Control Circuit
fADC Amplifier Circuit Simulations
miniature audio oscillator circuit
H1277 HIGH SENSITIVITY HALL EFFECT SENSOR IC WITH FG OUTPUT
DIY Tremolo Effect
dancing lights circuit diagram
1490 Digital Compass
Dimming the Nixies
Xbee Wireless Servo Motor Control Circuit
Push Pull Triodes for Class C
A control circuit diagram 555 pairs steady mode
Dolby IC CX1100 series and Application
Thermistor lights lighting delay circuit



Top