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1. LF: Sine wave/Sq wave (score: 1): Author: <[email protected]>; Date: Fri, 7 Sep 2018 15:20:30 +0100; 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 A; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-09/msg00087.html (8,765 bytes)
2. Re: LF: Sine wave/Sq wave (score: 1): Author: Andy Talbot <[email protected]>; Date: Fri, 7 Sep 2018 15:42:08 +0100; Unfortunately, 0dBm from a 50R source into a Schmitt isn't enough in many cases. 74HC series logic has Schmitt thresholds at 30% and 70% of supply volts, which if 5V needs at least 2V pk-pk. At; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-09/msg00088.html (10,818 bytes)
3. Re: LF: Sine wave/Sq wave (score: 1): Author: Andy Talbot <[email protected]>; Date: Fri, 7 Sep 2018 15:50:42 +0100; When I did this, for the -4dBm out from a DDS source, I designed a custom filter for the DDS anti-aliassing that had asymmetric termination impedances and provided a voltage step-up. (AADE filter des; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-09/msg00089.html (12,082 bytes)
4. Re: LF: Sine wave/Sq wave (score: 1): Author: DK7FC <[email protected]>; Date: Fri, 07 Sep 2018 22:15:11 +0200; 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; /rsgb_lf_group-archives/html/rsgb_lf_group/2018-09/msg00096.html (9,881 bytes)

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