Single-ended and differential transistor amplifier circuits with full signal modulation compensation techniques which are technology independent

A differential amplifier circuit, comprising:

• main differential amplifier means including first and second differentially connected main transistors the first and second main transistors connected through a degeneration resistor wherein a signal current is produced across said degeneration resistor in response to an applied input stimulus, and a transfer function having a non-linear error;
• and
• a resistively degenerated differential compensation amplifier means for producing and applying first and second differential compensating current signals to the main amplifier means which are equal and opposite to and cancel respective current variations in the first and second main transistors caused by said non-linear error respectively;
• in which the compensating means and generator means are configured such that substantially constant current flows through the first and second main transistors thereby maintaining a constant forward base emitter voltage.

A differential amplifier circuit, comprising:

• main differential amplifier means including first and second differentially connected main transistors the first and second main transistors connected through a degeneration resistor wherein a signal current is produced across said degenerating resistor in response to an applied input stimulus, and a transfer function having a non-linear error;
• and
• a resistively degenerated differential compensation amplifier means for producing and applying first and second differential compensating current signals to the main differential amplifier means which are equal and opposite to and cancel respective current variations in the first and second main transistors caused by said non-linear error respectively;
• in which the compensating means and generator means are configured such that substantially constant forward base emitter voltage is maintained through the first and second main transistors.

A differential amplifier circuit comprising:

• a main differential amplifier means for maintaining a constant forward base-emitter voltage including,
• first and second main transistors connected through a degeneration resistor, and
• a signal current produced across said degeneration resistor in response to an applied input stimulus;
• and
• a resistively degenerated compensation means including, a pair of resistively degenerated differential amplifiers, for producing a pair of constant compensating differential current signals to said main differential amplifier means for maintaining a constant forward base-emitter voltage through the first and second main transistors.