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Jan wasn't exactly using a long length of twisted pair - it looked more like a capacitor than a delay line.
Twisted pair delay line is cheaper (in small quantities) than a purpose built PCB, an would probably work at 1.5GHz.
strange oscillator
Feb 01, 2022
Last reply: 4 years ago
42 Replies
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We use LMX2571, a really nice synthesizer. It only costs $7.50 but it's kind of a big deal to use. We had to write the driver from scratch and it was ugly. It wouldn't be so bad to program at one fixed frequency, but would still need a uP or an FPGA and code. I just want a tiny reasonably stable complementary 1.5 GHz clock.
The 10EP11 naturally oscillates at about 1.5G, with outputs connected directly to inputs inverted, basically a prop delay oscillator. I wonder if it can be persuaded to oscillate more predictably with an LC tank in the loop. Maybe even above 1.5G.
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