SPIKE INSENSITIVE INPUT STAGE FOR DIFFERENTIAL AMPLIFIER
Original Publication Date: 1999-Jun-01
Included in the Prior Art Database: 2002-Aug-08
The proposal relates to the input stage of an operational amplifier (op amp). Figure 1 illustrates a single-ended op amp hav- ing current-source powered transistors Ml and M2 (e.g., P-PETS), output state Al, feedback resistor Rl , and parasitic capacity Cl (dashed) between the common transistor sources (Ml, M2) and ground. The op amp receives differential input signals "In-" and "In+" (at Ml, M2) and provides output signal Out.