Class-C amplifiers are not linear in any topology. Amplifiers of classes AB1, AB2 and B can be linear only when a tuned tank circuit is employed, or in the push-pull topology, in which two active elements (tubes, transistors) are used to amplify positive and negative parts of the RF cycle respectively. Ĭlass-A amplifiers can be designed to have good linearity in both single ended and push-pull topologies. Load impedance, supply voltage, input base current, and power output capabilities can affect the efficiency of the amplifier. Linearity refers to the ability of the amplifier to produce signals that are accurate copies of the input, generally at increased power levels. There are a number of amplifier classes providing various trade-offs between implementation cost, efficiency, and signal accuracy. No amplifier can provide perfect linearity however, because the amplifying devices- transistors or vacuum tubes-follow nonlinear transfer function and rely on circuitry techniques to reduce those effects. A linear amplifier responds to different frequency components independently, and tends not to generate harmonic distortion or intermodulation distortion. Linearity refers to the ability of the amplifier to produce signals that are accurate copies of the input. Other types of linear amplifier are used in audio and laboratory equipment. The term usually refers to a type of radio-frequency (RF) power amplifier, some of which have output power measured in kilowatts, and are used in amateur radio. ![]() ![]() Electronic circuit Linearity testing of a single-sideband transmitterĪ linear amplifier is an electronic circuit whose output is proportional to its input, but capable of delivering more power into a load.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |