Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 4044313 | Protective network for an insulated-gate field-effect (IGFET) differential amplifier The input stage of an amplifier includes two input terminals to which are connected the gates of two, differentially connected, IGFETs protected by two diodes connected back-to-back (in series) between the gates. The amplifier also includes means for appl... | 08/23/1977 |
| 4042886 | High input impedance amplifier circuit having temperature stable quiescent operating levels An amplifier configuration is disclosed which utilizes a resistive, positive feedback network to develop a high input impedance. The amplifier, which is suitable for manufacture in monolithic integrated circuit form, includes a pair of differential transi... | 08/16/1977 |
| 4032856 | Drift compensated amplifier, particularly for measuring signals A gas analyzer has an output amplifier circuit which is drift compensated in that zero volts are established across a gain network for a particular low point measuring signal as the amplifier provides an output on the basis of a particular bias, while the... | 06/28/1977 |
| 4032855 | Phonograph preamplifier network with infrasonic cutoff response A phonograph preamplifier network with infrasonic cutoff response. The preamplifier network is an active filter configuration with a high gain, high input impedance differential amplifier provided with an RIAA equalization feedback filter network coupled ... | 06/28/1977 |
| 3997850 | Floating electrical output circuit In a floating electrical output circuit according to co-pending application Ser. No. 395,608, now U.S. Pat. No. 3,909,737, issued Sept. 30, 1975, two load terminals are driven from amplifying means having differential current outputs. A differential ampli... | 12/14/1976 |
| 3991380 | Complementary field effect transistor differential amplifier A feedback circuit responsive to the output signals of two amplifiers provides feedback in a sense to amplify differential mode components and reject common mode components of input signals supplied to the amplifiers, the resultant common mode rejection r... | 11/09/1976 |
| 3984780 | CMOS voltage controlled current source A CMOS voltage controlled current source is described for furnishing current to a load in a charging mode and to receive current from a load in a discharging mode of operation. This bi-lateral current source is voltage controlled and provides a current wh... | 10/05/1976 |
| 3983334 | Matrix and equalizer circuit with gain control A combined matrix and equalizer circuit comprises a matrix circuit for operating with gains on a plurality of input signals. A feedback loop feeds back from a point between output terminals of the matrix circuit and a specific one of the input terminals o... | 09/28/1976 |
| 3983502 | Bridge-output amplifier with direct-coupled differential-mode feedback A bridge-output amplifier, comprising four transistor means connected in bridge responsive to a drive signal to supply opposite ends of a cross-arm load with push-pull output signals, has direct-coupled differential mode feedback to reduce the quiescent p... | 09/28/1976 |
| 3970923 | Apparatus for measuring sheet resistivity of semiconductor materials and diffused layers A device for measuring sheet resistivity of semiconductor materials and diffused layers uses a linear four-point probe having pneumatically-actuated contact pins coupled to a self-zeroing voltage amplifier and a current source having extremely high output... | 07/20/1976 |
| 3969636 | Charge sensing circuit for charge transfer devices In a charge transfer device electrode operating voltage is applied through a high-gain differential amplifier having an inverting and a non-inverting input terminal with capacitive feedback from the output terminal to the inverting terminal. The inverting... | 07/13/1976 |
| 3969682 | Circuit for dynamic control of phase shift A current controlled variable transconductance amplifier having a differential input stage and a current source output stage is employed with negative feedback, either through a buffer amplifier or directly, to provide various all-pass, low-pass or high-p... | 07/13/1976 |
| 3955149 | Differential amplifier having active feedback circuitry Common-mode and differential-mode active electrical and electro-optic feedback systems are formed with a plurality of physically interchangeable circuits. One of a plurality of input stage amplifiers can be connected to one of a plurality of loads through... | 05/04/1976 |
| 3949317 | Fast recovery limiting and phase inverting amplifier An amplifier comprising a paraphase amplifier and a differential amplifier for converting a signal voltage to a signal current that is linearly related to an input voltage between two well-defined output current limits and further having a dynamic range t... | 04/06/1976 |
| 3947704 | Low resistance microcurrent regulated current source A low resistance closed feedback loop regulated current source for supplying a load, the source being of the type including a transistor having input and output electrodes respectively connected between voltage input and current output terminals, and said... | 03/30/1976 |
| 3931583 | Wideband differential amplifier A wideband differential amplifier comprises a pair of differentially connected control devices, for example transistors, having a pair of semiconductor junction input devices coupled thereto for receiving complementary input currents. The input devices ex... | 01/06/1976 |
