233 Gilbert Mixer
233 : Gilbert Mixer
- Author: Kolos Koblasz
- Description: Gilbert Cell mixer for up and down conversion
- GitHub repository
- Clock: 100000000 Hz
How it works
This mixed signal circuit is a mixer. It can up or down convert a signal. The digital control part can generate internal LO signal with different frequencies, but also can pass an external Lo signal to the analog mixer.
How to test
Send analog signal to the input ports and measure the output ports. Also apply external LO or use internal LO source.
External hardware
Since the user have to bias the in_n and in_p ports with 900-950mV and apply a differential signal in the range of 20mV peak-to-peak I would say a custom interface PCB is needed to use the mixer. TO DO later.
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | ext_lo_en | ||
| 1 | ext_lo_n | ||
| 2 | ext_lo_p | ||
| 3 | int_lo_settings[0] | ||
| 4 | int_lo_settings[1] | ||
| 5 | int_lo_settings[2] | ||
| 6 | |||
| 7 |
Analog pins
ua | PCB Pin | Internal index | Description |
|---|---|---|---|
| 0 | A4 | 4 | in_n |
| 1 | A1 | 1 | in_p |
| 2 | A3 | 3 | out_p |
| 3 | A2 | 2 | out_n |