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Title: Non-linear amplifier
Abstract:
A non-linear amplifier is disclosed including an amplifying transistor for amplifying an input signal, an output amplified signal being derived from the amplifying transistor. A series of PN junctions is provided to supply a determined bias voltage to the amplifying transistor. An emitter-follower stage, comprised of at least one emitter-follower transistor amplifier, is connected to an input of the amplifying transistor for compensating the bias voltage applied thereto. In one embodiment, the input signal is amplified by a power of n wherein n PN junctions are connected in parallel with (n-1) emitter-follower transistor amplifiers. The input signal is supplied through the (n-1) emitter-followers to the base electrode of the amplifying transistor. In an alternative embodiment, the input signal is amplified by a power of 1/n wherein (n-1) PN junctions are coupled to the emitter electrode of the amplifying transistor and (n-1) emitter-follower transistors are connected in cascade to the base electrode of the amplifying transistor. In this latter embodiment, an output transistor is connected to the output of the emitter-follower stage.
Other info: Inventors: Okada, Takashi (Yamato, JA) Utsunomiya, Kimitake (Tokyo, JA) Application Number: 492838 Filing Date: 1974-07-29 Publication_date: 1976-01-27 Assignee: Sony Corporation (Tokyo, JA) Primary Class(es): 327/540 327/346, 327/513, 327/595, 330/289, 330/296, 330/297 Other Classes: US Patent Ref:
Other Refs: Other References: viswanathan et al., "Simple 4-Quadrant Analogue Multiplier" Electronics Letters, Vol. 6, No. 23, Nov. 12, 1970, pp. 725-726. Liversidge, "Low-Cost Reciprocal-Law Circuit," Electronics Letters, Vol. 6, No. 13, June 25, 1970, pp. 389-390. | |