Claims
- 1. In an integrated laser/FLIR rangefinder having a combined laser/FLIR detector, a low voltage noise amplifier circuit for connection to the detector, the low voltage noise amplifier circuit comprising: a plurality of identical transistor amplifier circuits, with each single transistor amplifier circuit having an input coupling capacitor electrically connected between the single transistor amplifier and the combined laser/FLIR detector whereby the input coupling capacitors allow independent dc biasing without balancing adjustments or matching transistors, a current summing circuit connected to the plurality of transistor amplifiers for summing the outputs of the plurality of transistor amplifiers, a trans-resistance amplifier connected to the current summing circuit for maximizing high frequency response and producing a low impedance signal, a delay line and a difference amplifier, the delay line being opeatively connected to the junction of the trans-resistance amplifier and a positive terminal of the difference amplifier, and to a negative terminal of the difference amplifier whereby said difference amplifier combines the non-delayed output of the trans-resistance amplifier with the delayed output of the delay line for producing an analog signal representative of a laser return for digitalization.
- 2. The integrated laser/FLIR rangefinder according to claim 1 wherein each single transistor amplifier of the plurality of transistor amplifiers includes a PNP transistor.
- 3. The integrated laser FLIR rangefinder according to claim 3 wherein the plurality of transistor amplifiers is an integrated circuit.
- 4. The integrated laser FLIR rangefinder preamplifier according to claim 1 wherein said current summing circuit includes a corresponding plurality of capacitors with each single capacitor of the plurality of capacitors having an input connected to a preselected output of the plurality of transistor amplifiers and a second terminal, the second terminals of the plurality of capacitors being operatively connected in common and to the trans-resistance amplifier.
Parent Case Info
This application is a continuation of application Ser. No. 472,534, now abandoned, filed Mar. 7, 1983.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4153366 |
Mamon et al. |
May 1979 |
|
4195267 |
Stanley |
Mar 1980 |
|
Non-Patent Literature Citations (3)
Entry |
J. Markus, Guidebook of Electronic Circuits, 1974, pp. 33, 257, 258, 394, 395. |
J. Markus, Guidebook of Electronic Circuits, 1974, p. 262. |
Osche et al., "CO.sub.2 Laser-Forward Looking Infrared (FLIR) Integration Concepts", 1980, pp. 57-64, SPIE, vol. 227. |
Continuations (1)
|
Number |
Date |
Country |
Parent |
472534 |
Mar 1983 |
|