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Discrete PLL for single transistor FM transmitter

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Discrete PLL for single transistor FM transmitter Empty Re: Discrete PLL for single transistor FM transmitter

Post by Ivan Mon Feb 14, 2022 7:03 pm

dare4444 wrote:It's 74HC00
You wrote "CD4060" ?? Anyway, 74HC00 can be replaced with CD4011, 74HC74 with CD4013.

VBR Ivan

Ivan

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Discrete PLL for single transistor FM transmitter Empty Re: Discrete PLL for single transistor FM transmitter

Post by dare4444 Mon Feb 14, 2022 8:37 am

Ivan wrote:
dare4444 wrote:We would be really pushing CD4060 but I've tested the chip with 25MHz crystal and it still worked fine.
Maybe increasing the Vcc to +15V or even +18V would help. CMOS 4000 chips get faster with increasing Vcc. +18V is the maximum allowed value.

VBR from Ivan
It's 74HC00

dare4444

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Discrete PLL for single transistor FM transmitter Empty Re: Discrete PLL for single transistor FM transmitter

Post by Ivan Mon Feb 14, 2022 7:46 am

dare4444 wrote:We would be really pushing CD4060 but I've tested the chip with 25MHz crystal and it still worked fine.
Maybe increasing the Vcc to +15V or even +18V would help. CMOS 4000 chips get faster with increasing Vcc. +18V is the maximum allowed value.

VBR from Ivan

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Discrete PLL for single transistor FM transmitter Empty Discrete PLL for single transistor FM transmitter

Post by dare4444 Mon Feb 14, 2022 2:14 am

Del


Last edited by dare4444 on Wed May 25, 2022 8:46 am; edited 1 time in total

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