| 摘要 |
In an electronic circuit operable as a local oscillator frequency multiplier and mixing circuit, a squaring circuit is operated in response to a local oscillator frequency signal of a local oscillator frequency and is connected to a constant current circuit or a transistor circuit responsive to an input high frequency signal of a high frequency so as to obtain a frequency equal to a sum of an integral multiple or double of the local oscillator frequency and the high frequency and a difference between the integral multiple of the local oscillator frequency and the high frequency. The squaring circuit may be formed by four transistors connected in pairs while the transistor circuit may be structured by a cross-connected, emitter-coupled transistor circuit, an unbalanced emitter-coupled transistor circuit, or a pair of transistors. A control signal, such as an AGC control signal, may be given to the transistor circuit or the constant current circuit.
|
