AN548A MOTOROLA | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 8
Technical content
power gain of 16 dB and a bandwidth (– 1 dB) of 8 MHz. of 20 dB below the fundamental output. considerations are also presented. inherent superiority over other methods at this frequency. lossy than lumped constant components. Figure 1. Schematic Diagram of 25 W UHF Amplifier
2 MOTOROLA SEMICONDUCTOR APPLICATION INFORMATION
chosen due to the ease of working with that type of material. in the manner described in AN282A. Figure 2. Transistor Complex Input and Output Figure 3. Equivalent Circuit of Input Network
factor in the denominator to (w/h).0297. to the Smith chart solution. conductance circle that point C lies on is noted to be 0.23. exist on a standard Smith chart and must be constructed. Figure 4. Smith Chart Solution
4 MOTOROLA SEMICONDUCTOR APPLICATION INFORMATION
This completes the solution for the input network. are solved in similar fashion with the following differences. the collector impedance of the output device. the number of tuning adjustments necessary.
450 MHz 480 MHz 512 MHz
Figure 5. Typical Performance Specifications Figure 6. Proper Emitter Grounding Method layout and short ground paths. output and driver stages may enhance the stability. slight loss in gain; (about 0.1 to 0.2 dB overall). frequencies much lower than the operating frequency. 340, on the interface between the device and its heat sink. is a photo of the completed amplifier.
6 MOTOROLA SEMICONDUCTOR APPLICATION INFORMATION
7MOTOROLA SEMICONDUCTOR APPLICATION INFORMATION NOTES
8 MOTOROLA SEMICONDUCTOR APPLICATION INFORMATION
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters can and do vary in different applications. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer. Literature Distribution Centers: USA: Motorola Literature Distribution; P.O. Box 20912; Phoenix, Arizona 85036. EUROPE: Motorola Ltd.; European Literature Centre; 88 Tanners Drive, Blakelands, Milton Keynes, MK14 5BP, England. JAPAN: Nippon Motorola Ltd.; 4-32-1, Nishi-Gotanda, Shinagawa-ku, Tokyo 141, Japan.