Amplifier | PartQuest™ Explore

Application Area

Designer10

Member for

11 years 5 months

624

designs

10

groups

Big fan of VHDL-AMS

Differetial amplifier

Designer62196

Member for

8 years 9 months

2

designs

1

groups

Add a bio to your profile to share information about yourself with other SystemVision users.

12v Pre amp and 30v D-Class Amp (mono)

Designer55231

Member for

8 years 10 months

1

designs

1

groups

Add a bio to your profile to share information about yourself with other SystemVision users.

1kV Low-power Piezo driver with totem-pole stage

Designer24581

Member for

9 years 2 months

33

designs

1

groups

Add a bio to your profile to share information about yourself with other SystemVision users.

BJT Common Emitter Amplifier

Designer24581

Member for

9 years 2 months

33

designs

1

groups

Add a bio to your profile to share information about yourself with other SystemVision users.

Common Source Amplifier

Designer25416

Member for

9 years 2 months

1

designs

1

groups

Add a bio to your profile to share information about yourself with other SystemVision users.

Loudspeaker with Simple Amplifier

Designer5776

Member for

9 years 5 months

6

designs

1

groups

Add a bio to your profile to share information about yourself with other SystemVision users.

Description

This simple* analog electronic amplifier design demonstrates the importance of multi-discipline system modeling. A swept frequency response test, from 40 Hz to 1000 Hz, shows the complex amplifier loading effect of the voice-coil and speaker-cone dynamics. The electro-mechanical resonances strongly affect the current that must be supplied, in order to maintain a flat (controlled) output voltage over the specified frequency range. For example, the current in the voice-coil reaches a null at time 0.1 seconds, which corresponds to the effective "spring-mass" resonance frequency. The loudspeaker reaches its minimum impedance around 600 Hz, or near 0.6 seconds, where the peak load current is observed.Normalized component stress monitoring signals are provided in all “datasheet specified” electronics models. For example, the simulation results show that the average power (bjt1/pwr_avg) in the BDP947 NPN BJT exceeds its 5 Watt rating across the entire range, but especially at lower frequencies. The corresponding stress monitor (bjt1/stress_ratio_power_avg) normalizes the transistor's average power relative to its 5W rating, so it is easy to see that the component is stressed (i.e. stress_ratio_power_avg &gt; 1.0), making it obvious in this case that we need a bigger transistor!*Note: This is not intended to be a practical amplifier design. There is no blocking capacitor at the output, so it allows undesirable DC current into the voice coil. The purpose is to focus attention on the dynamic characteristics of the loudspeaker and not the circuit itself.

About text formats

Common Emitter BJT Amplifier

Designer5181

Member for

9 years 6 months

3

designs

1

groups

Add a bio to your profile to share information about yourself with other SystemVision users.

Simple amplifier circuit

Designer10

Member for

11 years 5 months

624

designs

10

groups

Big fan of VHDL-AMS

Simple amplifier circuit

Designer10

Member for

11 years 5 months

624

designs

10

groups

Big fan of VHDL-AMS

Terms of Use Cookie Notice Data Privacy Notice