271 Analog Test Circuit ITS 2
271 : Analog Test Circuit ITS 2
- Author: A. N Irfansyah, Raditya Eka, Yohanes Stefanus
- Description: PLL parts (VCO and phase detector)
- GitHub repository
- Clock: 0 Hz
How it works
This tinytapeout submission consists of:
- A VCO based on transmission gates with additional on-chip capacitors to further linearize the response.
- A phase detector and VCO to form parts of a PLL.
How to test
Pinouts:
Analog pins:
ua[0] - VCO #1 output
ua[1] - VCO#1 VCONT- / Phase Detector (PLL) ref
ua[2] - VCO#1 VCONT+ / Phase Detector (PLL) input / PLL feedback
ua[3] - PLL VCO output
ua[4] - PLL Filter (n)
ua[5] - PLL Filter (p)
External hardware
To test, typical experimental setup to test pll, or vco, would be required.
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | |||
| 1 | |||
| 2 | |||
| 3 | |||
| 4 | |||
| 5 | |||
| 6 | |||
| 7 |
Analog pins
ua | PCB Pin | Internal index | Description |
|---|---|---|---|
| 0 | B5 | 11 | vco1_out |
| 1 | B0 | 6 | vco1_in- |
| 2 | B4 | 10 | vco1_in+ |
| 3 | B1 | 7 | pllvco_out |
| 4 | B3 | 9 | pllfilter_n |
| 5 | B2 | 8 | pllfilter_p |