Charge amplifier circuit

Details Charge amplifier circuit Charge amplifier circuit

1989-09-01

1991-04-23

Mottola, Steven

Amplifiers

Signal feedback

Phase shift means in loop path

330306, H03F 3191

Patent

active

050103024

ABSTRACT:
A charge amplifier circuit comprising an operational amplifier unit whose signal output is back to a signal input of the amplifier unit via a capacitative feedback element, the signal output of the operational amplifier unit also being coupled to an input of a following, further transmission unit that has a proportional, integrating transfer characteristic with a break-over frequency that is at least approximately equal to the break-over frequency of the operational amplifier unit, this being at least in the proximity of the break-over frequency defined by the feedback element of the operational amplifier unit. The feedback element of the operational amplifier unit can be optimized independently of the operating frequency range, this, allowing for a low resistance value for the feedback element given a transfer behavior that remains linear, this despite the low capacitor value that increases the charge sensitivity.

REFERENCES:
patent: 4117412 (1978-09-01), Holman, II
patent: 4275357 (1981-06-01), Nakayama et al.

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