| 摘要 |
1,043,124. Circuits employing field-effect transistors; television. RADIO CORPORATION OF AMERICA. Feb. 13, 1964 [Feb. 25, 1963], No. 6158/64. Headings H3T and H4F. Limiting is produced in an amplifier circuit employing an insulated-gate field-effect transistor by connecting the input to the gate through a capacitor 58 and connecting the gate to a point of reference potential and to a substrate electrode through respective resistors 56 and 68. A rectifying junction exists between the substrate and source electrodes so that for large-amplitude signals rectification takes place between substrate and source electrodes so producing a reverse bias at the gate electrode to produce a limiting effect. Similar limiting action may be produced in a synchronizing- signal separation, Fig. 5 (not shown) or in a free-running oscillator, Fig. 6 (not shown). |
