14.6: Exercises

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14.6.1: Analysis Problems

1. A telephony system has a frequency range from 200 Hz to 3.5 kHz. Determine the minimum acceptable PWM frequency.

2. A background music and paging system has a frequency range from 50 Hz to 10 kHz. Determine the minimum acceptable PWM frequency.

3. Determine the maximum rate of change of input voltage for a driver circuit capable of producing 50 mA with a load consisting of a 1.5 nF gate capacitance.

4. Determine the maximum rate of change of input voltage for a driver circuit capable of producing 60 mA with a load consisting of a 3.5 nF gate capacitance.

5. A power E-MOSFET has an \(r_{DS(on)}\) of 0.012 \(\Omega\) and switches a 100 volt source to an 8 \(\Omega\) load. Determine the maximum load current and \(V_{DS}\).

6. Four power E-MOSFETs drive a 4 \(\Omega\) load via a full bridge network. If each device has an \(r_{DS(on)}\) of 0.02 \(\Omega\) and they switch \(\pm\)75 volt sources to the load, determine the load current and \(V_{DS}\) of the devices.