Differential Amplifier Balun Circuit With Diode Bias Power Switching
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Solution Overview
Problem
Existing differential amplifying apparatuses require additional amplifier circuits for low and high power modes, making it difficult to reduce their size.
Innovation Solution
Incorporating diodes between input baluns and amplifiers, connected to a bias circuit, allowing power mode switching without dedicated configurations for low and high power modes, and utilizing transformers for signal conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate amplifier circuits are provided for low power mode and high power mode, then power mode switching capability is achieved, but device size increases
Solution Approach 1:
A single amplifier circuit is designed to perform multiple functions by operating in different power modes (low power mode and high power mode). The amplifier circuit can be switched between these modes through control signals, eliminating the need for separate dedicated amplifier circuits for each power mode. This multi-functional approach resolves the technical contradiction by achieving power mode switching capability while maintaining a compact device size.
Solution Approach 2:
The invention merges the functionality of separate low power mode amplifier circuit and high power mode amplifier circuit into a single unified amplifier circuit. By combining these functions and using switching mechanisms (such as switching elements or bias control), the apparatus achieves power mode flexibility without requiring multiple discrete circuits, thereby reducing overall device area.
2Adaptability or versatility
If separate amplifier circuits are provided for low power mode and high power mode, then power mode switching capability is achieved, but device complexity increases
Solution Approach 1:
The single amplifier circuit is designed with multi-functionality to handle both low power mode and high power mode operations. By implementing mode switching through control mechanisms (such as bias voltage adjustment or switching element control) rather than through separate dedicated circuits, the invention reduces circuit complexity while maintaining the capability to switch between power modes.
Solution Approach 2:
The invention extracts the essential function of power mode switching from the amplifier circuit design itself, rather than adding separate switching circuits. By integrating the power mode control functionality directly into the amplifier circuit operation (through bias control or internal switching mechanisms), the overall device complexity is reduced while achieving the desired adaptability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables miniaturization of the differential amplifying apparatus by allowing power mode switching through diode control, reducing circuit complexity and size.
Implementation Method 1
an input balun to which a signal inputted to the input terminal is input
Implementation Method 2
an output balun that outputs a signal to the output terminal
Implementation Method 3
a first diode provided between a reference potential and a path between the input balun and the first amplifier; a second diode provided between a reference potential and a path between the input balun and the second amplifier
Implementation Method 4
a bias circuit that applies a bias to the first diode and the second diode
Data Source
AI summary
A differential amplifying apparatus includes an input matching circuit serving as an input balun to which a signal inputted to an input terminal is input, an output matching circuit serving as an output balun that outputs a signal to an output terminal, first and second amplifiers provided in parallel between the input balun and the output balun and configured to output a differential signal, a diode provided between a reference potential and a path between the input balun and the first amplifier, a second diode provided between a reference potential and a path between the input balun and the second amplifier, and a bias circuit that applies a bias to the first diode and the second diode, in which a cathode of the first diode and a cathode of the second diode are connected to the reference potential side.