Voltage follower circuit

Details Voltage follower circuit Voltage follower circuit

1992-07-17

1993-11-09

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330260, H03F 345

Patent

active

052606724

ABSTRACT:
A voltage follower circuit comprising an input (10) for applying an input voltage and an output (20) for emitting an output voltage dependent on the input voltage includes a first current mirror circuit (Q1, Q3) having an input transistor (Q1) and an output transistor (Q3), the current flowing through the input transistor (Q1) depending on the input voltage and the output voltage being generated in dependence upon the current through the output transistor (Q3). Associated with the output transistor (Q3) of the first current mirror circuit (Q1, Q3) is a further input transistor (Q4) which with said output transistor (Q3) forms a second current mirror circuit (Q3, Q4). In the collector line of the further input transistor (Q4) a constant current source (K2) is disposed which impresses a constant current onto the second current mirror circuit (Q4, Q3).

REFERENCES:
patent: 3614645 (1971-10-01), Wheatley, Jr.

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