transistor radio Essay Samples

transistor radio

...musical world. … ‘s Functions - 60s … • equipped with earphone jacks, speakers (people usually held the radio against the side of the head, with the speaker against the ear.) • monaural and receives only the 540~1600 kilocycle AM broadcast band. • Earphones were inserted to one ear. Used piezoelectric crystals. Lessened the already-low fidelity of the AM broadcast. They were not ergonomically designed and were uncomfortable. - Modern Day (Sony Walkman SRF-S84, 2001) • Almost at least seven billion in the existence • Almost all tunable to the common AM band and also tunable to the FM band. Some receive shortwave broadcast as well. • Most operate on battery power • Small and cheap because of the improved electronics which pack millions of transistors on one integrated circuit or chip. • Now the transistor means the ‘old pocket radio’ … WAS Good For … - The phone company - Scientists building computers. - Companies • bought transistor licenses from Bell • come up with sales to get attention from the public (hand-held radio) o TI was looking for a product to get the attention from the public and radio was eligible. o TI built the transistor and Regency built the radio o TR-1 (the first commercial radio) was on the market (Oct/18/1954). ... IS Good For … - Music and information became portable. - Could hear the news of the worlds from anywhere. - Teenagers could listen to music from anywhere they wanted CAUSED THE REVOLUTION OF MUSIC ?? - The Evolution of … Dallas † TI’s part of the production of the first commercial transistorized radio. • Has four TI transistors. Also uses a TI subminiature output transformer. • The Transistors are made in the Semiconductor Products Division, and the transformers are made fro the Components Division. • Apparatus Division worked on engineering problems and the machining of models for the plastic case. • The receiver was assembled and marketed by the Regency Division (of Industrial Development Engineerin Associates, Inc., Indianapolis) • “Pocket Size”, 5 x 3 x 1 ¼ inches (the small set available then) • Contains semiconductor devices (less than 1/10 of a cubic inch) • Includes hi...

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