Exam 7: BJT Biasing

In order to determine the emitter current for the circuit shown in Figure 7-21,you must

While troubleshooting the circuit shown in Figure 7-26,the base voltage measures 1.8 V and the collector voltage measures 10 V,what should the technician do?

To prevent meter loading,a voltmeter used to make transistor circuit voltage measurements should have an input impedance of ________.

In the circuit shown in Figure 7-26,if R₁ opens

Whenever you have a circuit with npn transistors,you can often use the same circuit with pnp transistors and

Collector-feedback bias is still sensitive to changes in current gain,but it is used because of its

Voltage-divider bias is really emitter bias in disguise.

The intent of emitter-feedback bias is to

Collector-feedback bias is also called

Once the base voltage has been calculated for the circuit shown in Figure 7-29 (b),emitter voltage can be calculated by

With the switch in the position as shown in Figure 7-4 (a),the LED is on.

Since voltage-divider bias is derived from emitter bias,the Q point is virtually immune to changes in current gain.

In Figure 7-21,what effect do the capacitors have on the bias voltage in each stage?

The biasing configuration shown in Figure 7-18 is derived from emitter bias and is referred to as

If R_E is adjusted to its maximum value in Figure 7-16,the Q point moves toward saturation.

What should a troubleshooter do if the base,collector,and emitter voltages in a transistor circuit all measure 0 V?

Using a firm voltage divider means that the collector current will be approximately

With ambiguous troubles,the troubleshooter very often must

A well-designed voltage-divider bias circuit is one in which the voltage divider appears stiff to the input resistance of the base.

Collector-feedback bias is also called