LF: Re: Sine wave/Sq wave

[<g3kevmal@talktalk.net>]

Hi Stefan

Look at the Decca amplifier 5501 cct which uses schmitt-triger  to shape the sine wave input. i have also used other methods in the past to achieve a sq  wave including chips and other transistor and fet circuits.

73 es gl de mal/g3kev

 

From: DK7FC

Sent: Friday, September 7, 2018 9:15 PM

To: rsgb_lf_group@blacksheep.org

Subject: Re: LF: Sine wave/Sq wave

 

Hi Mal,

The Schmitt-trigger could deform the duty-cycle of the the signal, which can be very critical for some kind of PAs :-) I often use a simple OP AMP and amplify the signal so that the OP AMP is clipping. Not the perfect way maybe but it worked just last weekend where i drove the H bridge that way from a low audio signal coming from the PC.

73, Stefan

Am 07.09.2018 16:20, schrieb g3kevmal@talktalk.net:

LF/MF

Someone was asking about converting sine wave to Sq wave recently from a TS590 to drive an Amplifier

Feed the DRV output sine wave  from the TS590 to a Schmitt triger cct and then use a Direct Amplifier similar to the Decca 5501 class D bridge amp.

I use this method on LF es MF and never had a problem.

 

73 gl de mal/g3kev