Differential amplifier circuit
US6137350A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1998 |
| Grant date | Oct 24, 2000 |
| Priority date | — |
| Expiry date | Oct 15, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45702
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The average value of an input signal supplied to an input terminal is generated by an integrating circuit consisting of a series circuit of a capacitor, a constant-current source transistor, and a resistor. The average value is used as the reference voltage for the differential amplifier circuit. Further, to each of differential pair transistors the sources of which are commonly connected, other transistors are cascode connected, respectively. Supplied to each gate of the cascode connected transistors is a divisional voltage of the differential voltage between the average voltage from the integrating circuit and the circuit power supply voltage, which divisional voltage is obtained by a capacitive divider circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.