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TCA440T Fiches technique(PDF) 3 Page - List of Unclassifed Manufacturers |
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TCA440T Fiches technique(HTML) 3 Page - List of Unclassifed Manufacturers |
3 / 11 page Functional description It contains several function units, which enable designing and assembling of efficient AM tuners. Caused by internal voltage stabilization characteristics are rather independent from supply voltage. The RF input signal reaches via a controllable and overdriving proof preselector stage a balanced mixer. By means of a RF - signal generated by a separated oscillator the input signal is transported into IF. Multiplicative mixing causes only few harmonic content. Gain control is carried out by means of two separated feedback control loops for preselector stage and IF amplifier. By these a loop bandwidth of approximately 100 dB is obtained. The control voltage of the IF - amplifier can be used to drive a moving - coil instrument (field strength indicator). The IF amplifier consists of 4 amplifier stages, the first, second and third can be controlled. The bandwidth of the IF amplifier is approximately 2 MHz and on that account sufficient for usual IF frequencies in the AM range of approximately 460 kHz. The symmetrical arrangement of the entire circuitry guarantees well oscillating. The bridge of the mixer avoids direct breakdown. Absolute maximum ratings min max unit Supply voltage VCC 4.5 15.0 V Junction temperature Tj 150 °C Ambient operating temperature Ta -15 80 °C Storage temperature Ts -40 125 °C Total thermal resistance Rthja 120 K/W Recommended operational conditions min max unit Supply voltage VCC 4.5 15 V Ambient operating temperature Ta -10 70 °C 12/95 3 TCA 440 / T |
Numéro de pièce similaire - TCA440T |
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Description similaire - TCA440T |
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