Patent
Frequency converting circuit
TLDR
In this paper, a frequency converting circuit is provided comprising a constant current source, an oscillation circuit including an amplifier, an operation circuit and a frequency converter for converting the output signal of the operation circuit.Abstract:
A frequency converting circuit is provided comprising a constant current source, an oscillation circuit including an amplifier so connected to the constant current source as to operate in the unsaturated operation region owing to the output current of the constant current source, an operation circuit which receives an input signal and the output signal from the oscillation circuit and produces an output signal corresponding to the product of both the received signals and a frequency converter for converting the frequency of the output signal of the operation circuit.read more
Citations
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Single-ended to differential converter
TL;DR: In this paper, a single-ended to differential converter (SDC) with bias bias circuits was proposed, where the control electrodes of the first (402, 502) and second (404, 504) transistors were bias to maintain the same DC currents through their current electrodes.
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Balanced mixer with inductive coupling between rf input transistor pair emitters
TL;DR: In this article, the authors proposed to use a series inductive element and an optional parallel capacitive element in line with the radio frequency input to reduce the thermal noise in a conventional Gilbert-cell active mixer.
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TL;DR: In this article, a transistor commuted double balanced mixer that uses a Gilbert cell mixer quad transistor core is described, where the RF input differential pair is deleted from the standard Gilbert cell mixers configuration.
References
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Patent
Double-balanced frequency converter
Mitsuo Ohsawa,Yamatani Wataru +1 more
TL;DR: In this article, a double-balanced type mixing stage with a first and second differential amplifiers was proposed, where the second differential amplifier receives the input signal in opposite phase relation.
Patent
Frequency converter circuit with integrated injection capacitor
TL;DR: In this article, a signal converter circuit having a mixer circuit with an input terminal for receiving radio frequency (RF) signals and locally oscillated signals, by way of an injection or coupling capacitor, from the output of a local oscillator circuit, is formed between a pair of terminals of a capacitor element provided on a semiconductor substrate.
Patent
High frequency amplifier with frequency conversion
TL;DR: In this article, a high frequency amplifier consisting of an amplifying circuit, an emitter follower which makes the output impedance of the amplifier low and an impedance matching network consisting of a coil and a condenser is connected between the amplifier and the emitter.
Patent
Frequency conversion module including emitter follower mixer
David L Gunn,George M. Hanus +1 more
TL;DR: In this paper, a frequency conversion circuit for a frequency-modulated receiver adapted to be manufactured in integrated circuit form is described, which includes an oscillator of the Colpitts type, a mixer arranged in an emitter follower configuration, and input and output amplifiers.