The LED in Fig.P5 requires 30 mA to emit a sufficient level of light. For the following circuit values, determine the amplitude of the square-wave input voltage necessary to make sure that the transistor saturates. Use 110% of the minimum value of base current as a safety margin to ensure saturation. Vcc=9 V, VCE(sat) = 0, Rc=270 2, RB= 3.3 K 2, and Bpc= 50. +Vcc Rc ON ON RB Vin 1s OFF
The LED in Fig.P5 requires 30 mA to emit a sufficient level of light. For the following circuit values, determine the amplitude of the square-wave input voltage necessary to make sure that the transistor saturates. Use 110% of the minimum value of base current as a safety margin to ensure saturation. Vcc=9 V, VCE(sat) = 0, Rc=270 2, RB= 3.3 K 2, and Bpc= 50. +Vcc Rc ON ON RB Vin 1s OFF
Introductory Circuit Analysis (13th Edition)
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Publisher:Robert L. Boylestad
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Transcribed Image Text:5. The LED in Fig.P5 requires 30 mA to emit a sufficient level of light. For the following
circuit values, determine the amplitude of the square-wave input voltage necessary to make
sure that the transistor saturates. Use 110% of the minimum value of base current as a safety
margin to ensure saturation. Vcc =9 V, vCE(sat) = 0, Rc=270 2, Rp = 3.3 K 2, and
BDc = 50.
+Vcc
RC
ON
ON
RB
Vin
1 s
OFF
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