Initializing circuit for long-time constant electronic devices

An initializing circuit for a long-time constant electronic device comprising in combination:

• amplifier means having a first and a second input terminal and an output terminal,
• a resistive network having a first and a second terminal at respective opposite extremities thereof and a third terminal disposed therebetween, said first terminal of said resistive network being adapted to receive input signals from a source thereof, said second and third terminal of said resistive network being connected respectively to said output terminal and said first input terminal of said amplifier means, said second input terminal of said amplifier means being connected to a reference potential,
• an integrating capacitor having a first and a second terminal, said first terminal of said integrating capacitor being coupled to said output terminal of said amplifier means.
• an auxiliary resistive network of substantially similar configuration as said resistive network but having a relatively lower impedance with respect thereto, said auxiliary resistive network having a first and a second terminal at its opposite extremities and a third terminal disposed therebetween, said first and second terminal of said auxiliary resistive network being connected respectively to said reference potential and to said output terminal of said amplifier means,
• switching means connected to said second terminal of said integrating capacitor and being responsive to logic signals derived from a source thereof for selectively coupling said last mentioned terminal to said third terminal of said resistive network to permit normal integration operation of said electronic device, and to said third terminal of said auxiliary resistive network to provide a substantially faster charging path for said integrating capacitor than that provided by said resistive network, so as to achieve initialization of the operation of said electronic device.