Question

Consider the circuits below. Both circuits are candidates to be used in a satellite where they would be used as heaters. It is desirable that the circuits produce a predictable amount of heat in their respective collector resistances, $R_c$. a) For both circuits, calculate the $V_c$ and $I_c$ for both $\beta = 10$ and $\beta = 100$. Make a table to present the results. b) Which circuit will be better suited to be used in the satellite? Motivate! Circuit 1 $V_{BB} = 2\text{ V}$ $V_{CC} = 15\text{ V}$ $+$ $5.1\text{ k}\Omega = R_c$ $V_c$ C $100\text{ k}\Omega = R_B$ B $+$ $V_B$ $V_{BE}$ E Circuit 2 $V_{BB} = 2\text{ V}$ $V_{CC} = 15\text{ V}$ $+$ $5.1\text{ k}\Omega = R_c$ $V_c$ C B $+$ $V_{BE}$ $V_B$ $E$ $1\text{ k}\Omega = R_E$

          Consider the circuits below. Both circuits are candidates to be used in a satellite where they would be
used as heaters. It is desirable that the circuits produce a predictable amount of heat in their respective
collector resistances, $R_c$.
a) For both circuits, calculate the $V_c$ and $I_c$ for both $\beta = 10$ and $\beta = 100$. Make a table to present the
results.
b) Which circuit will be better suited to be used in the satellite? Motivate!
Circuit 1
$V_{BB} = 2\text{ V}$
$V_{CC} = 15\text{ V}$
$+$
$5.1\text{ k}\Omega = R_c$
$V_c$
C
$100\text{ k}\Omega = R_B$
B
$+$
$V_B$
$V_{BE}$
E
Circuit 2
$V_{BB} = 2\text{ V}$
$V_{CC} = 15\text{ V}$
$+$
$5.1\text{ k}\Omega = R_c$
$V_c$
C
B
$+$
$V_{BE}$
$V_B$
$E$
$1\text{ k}\Omega = R_E$

Consider the circuits below. Both circuits are candidates to be used in a satellite where they would be
used as heaters. It is desirable that the circuits produce a predictable amount of heat in their respective
collector resistances, Rc.
a) For both circuits, calculate the Vc and Ic for both β = 10 and β = 100. Make a table to present the
results.
b) Which circuit will be better suited to be used in the satellite? Motivate!
Circuit 1
VBB = 2 V
VCC = 15 V
+
5.1 kΩ = Rc
Vc
C
100 kΩ = RB
B
+
VB
VBE
E
Circuit 2
VBB = 2 V
VCC = 15 V
+
5.1 kΩ = Rc
Vc
C
B
+
VBE
VB
E
1 kΩ = RE

Added by David B.

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