Impedance Measurement Module
AssemblyPatient-isolated analog front end that drives the canal with low-level AC at two frequencies and computes the impedance ratio that indicates file-tip position. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Bill of materials for Impedance Measurement Module
8 top-level lines as of r44196| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Dual-Frequency Signal Generator | dental-apex-locator-signal-gen | 1× | 1 | · | part |
| 2 | Sense Amplifier & Detector | dental-apex-locator-afe | 1× | 1 | · | part |
| 3 | Patient Isolation Barrier | dental-apex-locator-isolation | 1× | 1 | · | part |
| 4 | Measurement ADC | dental-apex-locator-adc | 1× | 1 | · | part |
| 5 | Bare PCB | pcb-bare | 1× | 1 | · | part |
| 6 | Microcontroller | mcu | 1× | 1 | · | part |
| 7 | SMD Passive (R/C/L) | smd-passives | 120× | 120 | · | part |
| 8 | Connector | connector | 3× | 3 | · | part |