Current boost for differential flash analog to digital converter driver
US5736952A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1996 |
| Grant date | Apr 7, 1998 |
| Priority date | — |
| Expiry date | Oct 9, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/362
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A high speed differential analog to digital converter (ADC) is provided. The high speed differential ADC includes a driver section, a comparator section and a decoder section. The driver section includes a pair of series connected resistor ladders. A positive phase and negative phase emitter follower transistor pair is connected to the pair of series connected resistor ladders. The positive phase and negative phase emitter follower transistor has a collector connected to a supply voltage and has an emitter coupled to a respective one of the pair of series connected resistor ladders. A respective positive phase and negative phase AC current source drives the base of the respective positive phase and negative phase emitter follower transistor. A reference DC current source is coupled to the base of the positive phase and negative phase emitter follower transistors for determining a range of the ADC. A current source transistor pair biases the emitter follower transistor pair. A first transistor of the current source transistor pair supplies current to the positive phase emitter follower transistor and a second transistor of the current source transistor pair supplies current to the n…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.