prototype block-diagram, short list of chips in the implementation, and a
discussion on resolution now on ohwr.org:
https://ohwr.org/project/microstepper/wikis/Block-diagram
The obvious way to increase resolution (make the smallest frequency step
smaller) is to lower the IF.
I guess the limit is
The LTC1655 is a good option if 16 bits are enough. It has an internal
reference which is a plus if your oscillator does not have a reference
output. The DIP8 package is also a plus for us hand solderers.
The AD5680 is a good 18 bit choice, and a bargain at $9.22 qty 1. It is
basically a 16 bit
lifesp...@claybuccellato.com said:
> Some thoughts that have occurred to me are coarse and fine DACs, possibly
> sigma-delta or pulse width modulation (PWM).
Pulse width modulation has noise at the frequency of the whole sequence. A 10
bit DAC running at 1 megahertz will have noise at 1
Am 13.01.20 um 19:29 schrieb Alexander Pummer:
there was one "zwischen basis-Schaltung" which has good noise
properties basically the basis and the emitter of a bipolar transistor
is connected to the two ends of a transformer's secondary winding ,a a
tap on said winding is grounded Ulrich
I have been looking into all-digital PLL designs to discipline an OCXO, the
scope of which would of course include GPS, as well as other reference
sources. A component of the block diagram would be the DAC converts the
digital control loop output for application to the OCXO tune port. In order
Simulation indicates that the required C value depends on the transformer turns
ratios and the RC product sets the notch frequency.
Large signal modulation of the transistor parameters results in a distorted
signal at the base when a large signal is applied to the output.
the RC product is
Some years ago I played a little with that buffer circuit and found out that
the isolation up to a few MHz can be improved a little with an RC feedback
network between base and collector.
I cannot find my notes right now, IIRC from the output the circuit can be seen
as a sort of bridge where
there was one "zwischen basis-Schaltung" which has good noise properties
basically the basis and the emitter of a bipolar transistor is connected
to the two ends of a transformer's secondary winding ,a a tap on said
winding is grounded Ulrich Rohde may could tell more about it, I have
seen
there was one "zwischen basis-Schaltung" which has good noise properties
basically the basis and the emitter of a bipolar transistor is connected
to the two ends of a transformer's secondary winding , a tap on said
winding is grounded. Ulrich Rohde may could tell more about it, I have
seen
Many years ago I did a study of Norton amplifiers and optimized for IP3
using non-linear circuit simulation tools. I published a two part
article in RF Design Magazine which covered the amplifier itself as well
as the non-linear model for the BJT. My use for the Norton amplifier did
not
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