Pulse Width Modulation (PWM or PDM) Circuits

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Pulse Width Modulation (PWM or PDM) Circuits

Postby steve_qix » Fri Apr 25, 2003 8:57 am

Here is the simplified, high quality Pulse Width Modulation (PWM) generator. This PWM generator may be used to drive any pulse modulator, tube or solid state, which accepts a standard TTL input.

The generator includes an anti-aliasing (audio low pass) filter, negative peak limiter and carrier level controls. The generator uses two ICs, and is fairly easy to build. The switching frequency of this generator is 110kHz.

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Visit the class E web site at:

http://www.classeradio.com
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steve_qix
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Solid State Pulse Width Modulator output section

Postby steve_qix » Fri Apr 25, 2003 9:17 am

This pulse width modulator output section accepts a standard TTL input from a PWM generator, and is capable of modulating transmitters running up to 22 amperes of drain current at 45V (carrier). A single 125V to 135V supply is required.



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Visit the class E web site at:

http://www.classeradio.com
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steve_qix
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Posts: 434
Joined: Fri Jan 31, 2003 11:03 am
Location: Townsend MA


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