Engineering topics
Publications and source records attributed to Huelsman, L. P..
This letter describes an active RC network which realizes a fourth-order low-pass Butterworth characteristic. It requires one active element and has the practical advantage that all capacitors have the same value. A design chart is included.
In this correspondence, the values of the parameters of some multilayer distributed RC notch networks are determined, and the usually accepted values are shown to be in error. The magnitude of the error is illustrated by graphs of the frequency response of the networks.
In extending Howe's (1969) work on design equations for active distributed RC networks, expressions relating the nondominant pole locations of a distributed-active low-pass network to the dominant pole locations are derived, along with expressions relating the Q of the nondominant poles to the Q of the dominant poles. It is shown that, in general, the effect of the nondominant poles is very small.
This report describes the properties of a three-layer distributed RC network consisting of two resistive layers separated by a dielectric which may be used to realize two zeros of transmission on the j-omega axis of the complex frequency plane. The relative location of the two zeros is controlled by the location of a contact placed on one of the resistive layers.
A set of digital computer programs for rapidly determining the important characteristics of an arbitrary DLA circuit is described. The circuit characteristics include dominant and non-dominant pole position, magnitude and phase response for sinusoidal steady-state excitation, pole sensitivity, and transient response in the time domain.
In this correspondence a new and interesting distributed lumped active network configuration that realizes an all-pass network function is described. A design chart for determining the values of the network elements is included.
The properties of a three layer distributed RC network consisting of two layers of resistive material separated by a dielectric are described. When the three layer network is used as a three terminal element by connecting conducting terminal strips across the ends of one of the resistive layers and the center of the other resistive layer, the network may be used to produce pairs of complex conjugate transmission zeros. The location of these zeros are determined by the parameters of the network. Design charts for determining the zero positions are included as part of the report.
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A new distributed-active circuit is described that has a lower sensitivity and utilizes its capacitor area more effectively than the circuit presented in an earlier correspondence by Howe (1969). The described circuit is approximately 2.8 times as effective in its use of capacitance, a fact which is directly translatable into savings of space and weight.
Tapered distributed RC low pass network configuration with voltage-controlled sources for sensitivity reduction low and high Q factors
Active RC network realization of third order lowpass Butterworth characteristic with all capacitors having same value
Charts for synthesizing biquadratic network function with complex poles and zeros by means of simple DLA network configuration
Complex optimization techniques applied to various sensitivity coefficient determination for distributed-lumped-active networks
Distributed active RC filters design for low pass, bandpass and biquadratic network functions, including charts for element values determination
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Three layer distributed RC network with two transmission zeros
Applying digital techniques to analysis and synthesis of DLA networks
Complex optimization and its application to distributed-lumped-active networks