Sujet : Re: High purity 1kHz oscillator
De : jl (at) *nospam* glen--canyon.com (john larkin)
Groupes : sci.electronics.designDate : 23. Oct 2024, 18:44:37
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <m5dihj1c33mh78kaeevnt7tmmsu4sn2cei@4ax.com>
References : 1
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On Tue, 22 Oct 2024 01:10:41 -0400, "Edward Rawde"
<
invalid@invalid.invalid> wrote:
But I suspect that component tolerances and mismatched FETs will ruin it.
The very best bulk metal foil resistors have voltage-resistance
coefficients of a few ppm/volt. Most resistors are much worse.
Just the resistors can kill distortion specs. At low frequencies,
self-heating and tempco can add distortion too; the old HP oscillators
had that effect from the lamp filament.
DGMS on capacitor nonlinearity.