Integrator with high gain and fast transient response

A method for minimizing high-frequency transient signals at an amplifier output, the method comprising the steps of:

• (a) providing an amplifier having an amplifier input and amplifier output;
• (b) feeding back a sample of high frequency output signals from the amplifier output to the amplifier input;
• (c) providing a secondary signal path having a common input with the amplifier input;
• and
• (d) adding the secondary signal path output to the amplifier output to effectively remove the high-frequency transient signals.

Apparatus for minimizing high-frequency transient signals at an amplifier-output comprising:

• amplifier means having an amplifier input and amplifier output;
• feedback means for feeding back a sample of high frequency output signals from the amplifier output to the amplifier input;
• secondary signal path means having a common input with the amplifier input;
• and
• means for adding the secondary signal path output to the amplifier output to effectively remove the high-frequency transient signals.

An integrator providing first and second signal paths between an integrator input and an integrator output, the integrator comprising:

• the first signal path including multiple cascaded inverting amplifiers coupled between the integrator input and an amplifier output;
• the second signal path limited to a single transconductor coupled between integrator input and output;
• a resistor coupled between the amplifier output and the integrator output;
• and
• a capacitor coupled between the amplifier output and the integrator input;
• such that the first signal path provides a relatively high-gain, narrowband amplifier, and the second signal path provides a relatively low-gain, broadband amplifier, and the first and second signal paths sum through the resistor to form a single amplifying structure with relatively high low-frequency gain, and relatively fast high-frequency transient response.