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John Ernest
John Ernest
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enter image description here

Above is the image, it's the clock from an Atari 2600 Jr.

I'm new to electronics and all the books I've gone through so far don't cover XTALs. I have no idea why, seems pretty important to electronics. My searching over google/youtube hasn't gotten me any usefully direct answers either.

This particular circuit has a 3.579575Mhz XTAL, 2 PNPs, 67 Resistors, and 2 Capacitors. I'd like to know what's happening at each node and what's happening at CLOCK OUT in terms of the wave form (what's the end oscillating frequency at CLOCK OUT?).

Is there a circuit simulator (open source) that can allow you to input XTALs in a circuit? So far I haven't come across one.

enter image description here

Above is the image, it's the clock from an Atari 2600 Jr.

I'm new to electronics and all the books I've gone through so far don't cover XTALs. I have no idea why, seems pretty important to electronics. My searching over google/youtube hasn't gotten me any usefully direct answers either.

This particular circuit has a 3.579575Mhz XTAL, 2 PNPs, 6 Resistors, and 2 Capacitors. I'd like to know what's happening at each node and what's happening at CLOCK OUT in terms of the wave form (what's the end oscillating frequency at CLOCK OUT?).

Is there a circuit simulator (open source) that can allow you to input XTALs in a circuit? So far I haven't come across one.

enter image description here

Above is the image, it's the clock from an Atari 2600 Jr.

I'm new to electronics and all the books I've gone through so far don't cover XTALs. I have no idea why, seems pretty important to electronics. My searching over google/youtube hasn't gotten me any usefully direct answers either.

This particular circuit has a 3.579575Mhz XTAL, 2 PNPs, 7 Resistors, and 2 Capacitors. I'd like to know what's happening at each node and what's happening at CLOCK OUT in terms of the wave form (what's the end oscillating frequency at CLOCK OUT?).

Is there a circuit simulator (open source) that can allow you to input XTALs in a circuit? So far I haven't come across one.

Source Link
John Ernest
John Ernest
  • 123
  • 4

Need Help Understanding a Circuit (Atari 2600 XTAL Oscillator)

enter image description here

Above is the image, it's the clock from an Atari 2600 Jr.

I'm new to electronics and all the books I've gone through so far don't cover XTALs. I have no idea why, seems pretty important to electronics. My searching over google/youtube hasn't gotten me any usefully direct answers either.

This particular circuit has a 3.579575Mhz XTAL, 2 PNPs, 6 Resistors, and 2 Capacitors. I'd like to know what's happening at each node and what's happening at CLOCK OUT in terms of the wave form (what's the end oscillating frequency at CLOCK OUT?).

Is there a circuit simulator (open source) that can allow you to input XTALs in a circuit? So far I haven't come across one.